
Multiple Choice Questions in Plane Geometry Part 2 | Mathematics Board Exam Practice
Part 2 of the Plane Geometry MCQ Series continues where the first set left off, and the problems here are designed to push your understanding a little further.
If you have already worked through Part 1, you have a decent foundation to build on. This set draws from the same pool of reliable sources including past board exam problems, engineering mathematics textbooks, academic journals, and other references that serious reviewees have used for years. The questions cover a range of plane geometry concepts that regularly appear in the Mathematics section of the board exam.
This is the part of the review process where patterns start to become visible. Certain problem types show up repeatedly across board exams, and the more exposure you get, the faster you recognize them. That recognition under time pressure is a real advantage inside the exam room.
Work through every item in this set without skipping. The ones that slow you down deserve the most attention. If you find yourself struggling with a concept that also gave you trouble in Part 1, that is a clear signal to go back and spend more time on it before moving forward.
Part 1 is still on Pinoybix if you need to go back. Otherwise, keep your focus and work through this set with the same intention you brought to the first one.
MCQ Topic Outline included in Mathematics Board Exam Syllabi
MCQ in Venn Diagram | MCQ in Definition of Plane Geometry | MCQ in Angles | MCQ in Circles | MCQ in Ellipse | MCQ in Polygons | MCQ in Triangles | MCQ in Quadrilaterals | MCQ in Trapezoids and Trapeziums | MCQ in Parallelograms | MCQ in Square and Rectangles | MCQ in Rhomboid and Rhombus
Continue Practice Exam Test Questions Part 2 of the Series
⇐ MCQ in Plane Geometry Part 1 | Mathematics Board Exam
Choose the letter of the best answer in each questions.
51. The sides of a right triangle have lengths (a – b), a, and (a + b). What is the ratio of a to b if a is greater than b and b could not be equal to zero?
A. 1 : 4
B. 3 : 1
C. 1 : 4
D. 4 : 1
Answer: Option D
Solution: What is the ratio of a to b if a is greater than b and b could not be equal to zero?
52. Two sides of a triangle measure 8 cm and 12 cm. find its area if its perimeter is 26 cm.
A. 21.33 sq. m.
B. 32.56 sq. cm.
C. 3.306 sq. in.
D. 32.56 sq. in.
Answer: Option A
Solution: Find its area if its perimeter is 26 cm.
53. If three sides of a triangle of an acute triangle is 3 cm, 4 cm, and “x” cm, what are the possible values of x?
A. 1 < x < 5
B. 0 < x > 5
C. 0 < x < 7
D. 1 < x > 7
Answer: Option A
Solution: what are the possible values of x?
54. In triangle ABC, AB = 8 m and BC = 20 m. one possible dimension of CA is:
A. 13
B. 7
C. 9
D. 11
Answer: Option A
Solution: In triangle ABC, AB = 8 m and BC = 20 m. One possible dimension of CA is
55. In a triangle BCD, BC = 25 m. and CD = 10 m. The perimeter of the triangle may be.
A. 72 m.
B. 70 m.
C. 69 m.
D. 71 m.
Answer: Option C
Solution: The perimeter of the triangle may be
56. The sides of a triangle ABC are AB = 25 cm, BC = 39 cm, and AC = 40 cm. Find its area.
A. 486 sq. cm.
B. 846 sq. cm.
C. 648 sq. cm.
D. 468 sq. cm.
Answer: Option D
Solution: The sides of a triangle ABC are AB = 25 cm, BC = 39 cm, and AC = 40 cm. Find its area
57. The corresponding sides of two similar triangles are in the ratio 3:2. What is the ratio of their areas?
A. 3
B. 2
C. 9/4
D. 3/2
Answer: Option C
Solution: What is the ratio of their areas?
58. Find the area of the triangle whose sides are 12, 16, and 21 units.
A. 95.45 sq. units
B. 102.36 sq. units
C. 87.45 sq. units
D. 82.78 sq. units
Answer: Option A
Solution: Find the area of the triangle whose sides are 12, 16, and 21 units
59. The sides of a right triangle are 8, 15 and 17 units. If each side is doubled, how many square units will be the area of the new triangle?
A. 240
B. 300
C. 320
D. 420
Answer: Option A
Solution: How many square units will be the area of the new triangle?
60. Two triangles have equal bases. The altitude of one triangle is 3 units more than its base and the altitude of the other is 3 units less than its base. Find the altitudes, if the areas of the triangle differ by 21 square units.
A. 5 & 11
B. 4 & 10
C. 6 & 12
D. 3 & 9
Answer: Option B
Solution: Find the altitudes, if the areas of the triangle differ by 21 square units
61. A triangular piece of wood having a dimension 130 cm, 180 cm, and 190 cm is to be divided by a line bisecting the longest side drawn from its opposite vertex. The area of the part adjacent to the 180-cm side is:
A. 5126 sq. cm.
B. 5162 sq. cm.
C. 5612 sq. cm.
D. 5216 sq. cm.
Answer: Option C
Solution: The area of the part adjacent to the 180-cm side is
62. Find EB if the area of the inner triangle is ¼ of the outer triangle.

A. 32.5
B. 55.7
C. 56.2
D. 57.5
Answer: Option D
Solution: Find EB if the area of the inner triangle is ¼ of the outer triangle
63. A piece of wire is shaped to enclose a square whose area is 169 cm2. It is then reshaped to enclose a rectangle whose length is 15 cm. The area of the rectangle is:
A. 165 cm2
B. 175 cm2
C. 170 cm2
D. 156 cm2
Answer: Option A
Solution: The area of the rectangle is
64. The diagonal of the floor of a rectangular room is 7.50 m. The shorter side of the room is 4.5 m. What is the area of the room?
A. 36 sq. m.
B. 27 sq. m.
C. 58 sq. m.
D. 24 sq. m.
Answer: Option B
Solution: What is the area of the room?
65. A man measuring a rectangle “x” meters by “y” meters, makes each side 15% too small. By how many percent will his estimate for the area be too small?
A. 23.55%
B. 25.67%
C. 27.75%
D. 72.25%
Answer: Option C
Solution: By how many percent will his estimate for the area be too small?
66. The length of the side of a square is increased by 100%. Its perimeter is increased by:
A. 25%
B. 100%
C. 200%
D. 300%
Answer: Option B
Solution: Its perimeter is increased by
67. A piece of wire of length 52 cm is cut into two parts. Each part is then bent to form a square. It is found that total area of the two squares is 97 sq. cm. the dimension of the bigger square is:
A. 4
B. 9
C. 3
D. 6
Answer: Option B
Solution: The dimension of the bigger square is
68. In the figure shown, ABCD is a square and PDC is an equilateral triangle. Find Ѳ.

A. 5°
B. 15°
C. 10°
D. 25°
Answer: Option B
Solution:
69. One side of a parallelogram is 10 m and its diagonals are 16 m and 24 m, respectively. Its area is:
A. 156.8 sq. m.
B. 185.6 sq. m.
C. 158.7 sq. m.
D. 142.3 sq. m.
Answer: Option C
Solution: The area of a parallelogram is
70. If the sides of the parallelogram and an included angle are 6, 10 and 100 degrees respectively, find the length of the shorter diagonal.
A. 10.63
B. 10.37
C. 10.73
D. 10.23
Answer: Option C
Solution: Find the length of the shorter diagonal
71. The area of a rhombus is 132 square cm. if its shorter diagonal is 12 cm, the length of the longer diagonal is:
A. 20 centimeter
B. 21 centimeter
C. 22 centimeter
D. 23 centimeter
Answer: Option C
Solution: The length of the longer diagonal is
72. The diagonals of a rhombus are 10 cm. and 8 cm., respectively. Its area is:
A. 10 sq. cm.
B. 50 sq. cm.
C. 60 sq. cm.
D. 40 sq. cm.
Answer: Option D
Solution: The diagonals of a rhombus are 10 cm. and 8 cm., respectively. Its area is
73. Given a cyclic quadrilateral whose sides are 4 cm, 5 cm, 8 cm, and 11 cm. Its area is:
A. 40.25 sq. cm.
B. 48.65 sq. cm.
C. 50.25 sq. cm.
D. 60.25 sq. cm
Answer: Option A
Solution: Given a cyclic quadrilateral whose sides are 4 cm, 5 cm, 8 cm, and 11 cm. Its area is
74. A rectangle ABCD which measure 18 by 24 cm is folded once, perpendicular to diagonal AC, so that the opposite vertices A and C coincide. Find the length of the fold.
A. 2
B. 7/2
C. 54/2
D. 45/2
Answer: Option D
Solution: Find the length of the fold
75. The sides of a quadrilateral are 10 m, 8 m, 16 m and 20 m, respectively. Two opposite interior angles have a sum of 225°. Find the area of the quadrilateral in sq. m.
A. 140.33 sq. m.
B. 145.33 sq. m.
C. 150.33 sq. m.
D. 155.33 sq. m.
Answer: Option B
76. A trapezoid has an area of 36 m2 and altitude of 2 m. Its two bases in meters have ratio of 4:5, the bases are:
A. 12, 15
B. 7, 11
C. 16, 20
D. 8, 10
Answer: Option C
Solution: Its two bases in meters have ratio of 4:5, the bases are
77. Determine the area of the quadrilateral ABCD shown if OB = 80 cm, OA = 120 cm, OD = 150 cm and Ѳ = 25°.
A. 2272 sq. cm
B. 7222 sq. cm
C. 2572 sq. cm
D. 2722 sq. cm
Answer: Option D
78. A corner lot of land is 35 m on one street and 25 m on the other street. The angle between the two lines of the street being 82°. The other to two lines of the lot are respectively perpendicular to the lines of the streets. What is the worth of the lot if its unit price is P2500 per square meter?
A. P1,978,456
B. P1,588,045
C. P2,234,023
D. P1,884,050
Answer: Option D
Solution: What is the worth of the lot if its unit price is P2500 per square meter?
79. Determine the area of the quadrilateral having (8, -2), (5, 6), (4, 1), and (-7, 4) as consecutive vertices.
A. 22 sq. units
B. 44 sq. units
C. 32 sq. units
D. 48 sq. units
Answer: Option A
Solution: Determine the area of the quadrilateral having (8, -2), (5, 6), (4, 1), and (-7, 4)
80. Find the area of the shaded portion shown if AB is parallel to CD.

A. 16 sq. m.
B. 18 sq. m.
C. 20 sq. m.
D. 22 sq. m.
Answer: Option B
Solution: Find the area of the shaded portion shown if AB is parallel to CD
81. The deflection angles of any polygon has a sum of:
A. 360°
B. 720°
C. 180°(n – 3)
D. 180° n
Answer: Option A
Solution:
82. The sum of the interior angles of a dodecagon is:
A. 2160°
B. 1980°
C. 1800°
D. 2520°
Answer: Option C
Solution:
83. Each interior angle of a regular polygon is 165°. How many sides?
A. 23
B. 24
C. 25
D. 26
Answer: Option B
Solution: Each interior angle of a regular polygon is 165°. How many sides?
84. The sum of the interior angles of a polygon is 540°. Find the number of sides.
A. 4
B. 6
C. 7
D. 5
Answer: Option D
Solution: Find the number of sides
85. The sum of the interior angles of a polygon of n sides is 1080°. Find the value of n.
A. 5
B. 6
C. 7
D. 8
Answer: Option D
Solution: The sum of the interior angles of a polygon of n sides is 1080°
86. How many diagonals does a pentedecagon have:
A. 60
B. 70
C. 80
D. 90
Answer: Option D
87. A polygon has 170 diagonals. How many sides does it have?
A. 20
B. 18
C. 25
D. 26
Answer: Option A
Solution: A polygon has 170 diagonals. How many sides does it have?
88. A regular hexagon with an area of 93.53 square centimeters is inscribed in a circle. The area in the circle not covered by hexagon is:
A. 18.38 cm2
B. 16.72 cm2
C. 19.57 cm2
D. 15.68 cm2
Answer: Option C
89. The area of a regular decagon inscribed in a circle of 15 cm diameter is:
A. 156 sq. cm.
B. 158 sq. cm.
C. 165 sq. cm.
D. 185 sq. cm.
Answer: Option C
Solution: The area of a regular decagon inscribed in a circle of 15 cm diameter is
90. The sum of the interior angle of polygon is 2,520°. How many are the sides?
A. 14
B. 15
C. 16
D. 17
Answer: Option C
Solution: The sum of the interior angle of polygon is 2,520°. How many are the sides?
91. The area of a regular hexagon inscribed in a circle of radius 1 is:
A. 2.698 sq. units
B. 2.598 sq. units
C. 3.698 sq. units
D. 3.598 sq. units
Answer: Option B
Solution: The area of a regular hexagon inscribed in a circle of radius 1 is
92. The corners of a 2-meter square are cut off to form a regular octagon. What is the length of the sides of the resulting octagon?
A. 0.525
B. 0.626
C. 0.727
D. 0.828
Answer: Option D
Solution: What is the length of the sides of the resulting octagon?
93. If a regular polygon has 27 diagonals, then it is a:
A. Hexagon
B. Nonagon
C. Pentagon
D. Heptagon
Answer: Option B
Solution:
94. One side of a regular octagon is 2. Find the area of the region inside the octagon.
A. 19.3 sq. units
B. 13.9 sq. units
C. 21.4 sq. units
D. 31 sq. units
Answer: Option A
95. A regular octagon is inscribed in a circle of radius 10. Find the area of the octagon.
A. 228.2 sq. units
B. 288.2 sq. units
C. 282.8 sq. units
D. 238.2 sq. units
Answer: Option C
Solution: Find the area of the octagon
96. The area of a circle is 89.4 square inches. What is the circumference?
A. 35.33 inches
B. 32.25 inches
C. 33.52 inches
D. 35.55 inches
Answer: Option C
Solution: The area of a circle is 89.4 square inches. What is the circumference?
97. A circle whose area is 452 cm square is cut into two segment by a chord whose distance from the center of the circle is 6 cm. Find the area of the larger segment in cm square.
A. 372.5
B. 363.6
C. 368.4
D. 377.6
Answer: Option B
98. A circle is divided into two parts by a chord, 3 cm away from the center. Find the area of the smaller part, in cm square, if the circles has an area of 201 cm square.
A. 51.4
B. 57.8
C. 55.2
D. 53.7
Answer: Option D
99. A quadrilateral ABCD is inscribed in a semi-circle with side AD coinciding with the diameter of the circle. If sides AB, BC, and CD are 8 cm, 10 cm, and 12 cm long, respectively, find the area of the circle.
A. 317 sq. cm.
B. 356 sq. cm.
C. 456 sq. cm.
D. 486 sq. cm.
Answer: Option A
Solution: Find the area of the circle
100. A semi-circle of radius 14 cm is formed from a piece of wire. If it is bent into a rectangle whose length is 1 cm more than its width, find the area of the rectangle.
A. 256.25 sq. cm.
B. 323.75 sq. cm.
C. 386.54 sq. cm.
D. 452.24 sq. cm.
Answer: Option B
Solution: Find the area of the rectangle
Online Question and Answer in Plane Geometry Series
Following is the list of practice exam test questions in this brand new series:
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I would like to ask for the solution of number 62. i cant find the answer . Thank you