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Friday, 14 August 2026
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Mathematics Past Questions and Answers

Topic: Plane geometric shapes

Jamb Mathematics Questions - Plane geometric shapes

Question 56:
Each of the interior angles of a regular polygon is 140°. How many sides has the polygon?
  • A 9
  • B 8
  • C 7
  • D 5
View Answer & Explanation
Question 57:
A trapezium has two parallel sides of length 5cm and 9cm. If the area is 91cm\(^2\), find the distance between the parallel sides
  • A 13 cm
  • B 4 cm
  • C 6 cm
  • D 7 cm
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Question 58:
Find the area and perimeter of a square whose length of diagonals is 20\(\sqrt2\) cm.
  • A 800 cm\(^2\), 80 cm
  • B 400 cm, 80 cm\(^2\)
  • C 80 cm, 800 cm\(^2\)
  • D 400 cm\(^2\), 80 cm
View Answer & Explanation
Question 59:
A rectangle has one side that is 6 cm shorter than the other. The area of the rectangle will increase by 68 cm\(^2\) if we add 2 cm to each side of the rectangle. Find the length of the shorter side.
  • A 15 cm
  • B 19 cm
  • C 13 cm
  • D 21 cm
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Question 60:
The area of a trapezium is 200 cm\(^2\). Its parallel sides are in the ratio 2 : 3 and the perpendicular distance between them is 16 cm. Find the length of each of the parallel sides.
  • A 10 cm and 15 cm
  • B 8 cm and 12 cm
  • C 6 cm and 9 cm
  • D 12 cm and 18 cm
View Answer & Explanation