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Perimeter & Area — Chapter Test

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Q1
Area of a triangle = ½ × base × ___ ?
Area of a triangle = ½ × base × height.
Q2
Circumference of a circle = 2 × π × ___ ?
Circumference = 2 × π × radius.
Q3
π is approximately equal to ___ ?
π ≈ 22/7 ≈ 3.14.
Q4
Area of a circle = π × ___ ?
Area = π × radius².
Q5
Area of a parallelogram with base 9 cm and height 6 cm?
9 × 6 = 54 sq cm.
Q6
Area of a triangle with base 8 cm and height 7 cm?
½ × 8 × 7 = 28 sq cm.
Q7
Area of a circle of radius 7 cm (π = 22/7)?
(22/7) × 49 = 154 sq cm.
Q8
Circumference of a circle of radius 7 cm (π = 22/7)?
2 × (22/7) × 7 = 44 cm.
Q9
Circumference of a circle of diameter 14 cm (π = 22/7)?
π × d = (22/7) × 14 = 44 cm.
Q10
1 m² equals how many cm²?
100 × 100 = 10,000 cm².
Q11
A circular garden has radius 7 m. How much fencing (circumference) is needed (π = 22/7)?
2 × (22/7) × 7 = 44 m.
Q12
A triangular plot has base 20 m and height 10 m. What is its area?
½ × 20 × 10 = 100 sq m.
Q13
Find the area of a circle of radius 14 cm (π = 22/7).
(22/7) × 14 × 14 = 616 sq cm.
Q14
A parallelogram has area 60 sq cm and base 12 cm. What is its height?
Height = area ÷ base = 60 ÷ 12 = 5 cm.
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