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Mensuration — Chapter Test

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Q1
Perimeter is to 'distance around' as area is to ___ ?
Area is the surface inside a shape.
Q2
Area of a right triangle = ½ × base × ___ ?
Area of a right triangle = ½ × base × height.
Q3
A regular hexagon has side 5 cm. What is its perimeter?
6 × 5 = 30 cm.
Q4
Which quantity is measured in square units?
Area is measured in square units.
Q5
What is the perimeter of a square of side 8 cm?
4 × 8 = 32 cm.
Q6
What is the perimeter of a rectangle 12 cm by 6 cm?
2 × (12 + 6) = 36 cm.
Q7
What is the area of a rectangle 9 cm by 7 cm?
9 × 7 = 63 sq cm.
Q8
What is the area of a square of side 6 cm?
6 × 6 = 36 sq cm.
Q9
What is the area of a right triangle with base 8 cm and height 5 cm?
½ × 8 × 5 = 20 sq cm.
Q10
What is the perimeter of an equilateral triangle of side 12 cm?
3 × 12 = 36 cm.
Q11
A garden is 25 m by 15 m. How much fencing is needed around it?
Perimeter = 2 × (25 + 15) = 80 m.
Q12
A floor is 8 m by 6 m. How many square metres of tiles are needed?
Area = 8 × 6 = 48 sq m.
Q13
A rectangle has area 48 sq cm and length 8 cm. What is its breadth?
Breadth = 48 ÷ 8 = 6 cm.
Q14
A square has a perimeter of 36 cm. What is its area?
Side = 36 ÷ 4 = 9 cm, so area = 9 × 9 = 81 sq cm.
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