Math Gr 8 Ch 13: Area and Perimeter

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What is the formula for the perimeter of a square?

P = 2s

P = 2s^2

P = s^2

P = 4s (correct)

What is the formula for the area of a rectangle?

A = l × b (correct)

A = 2(l + b)

A = l^2 + b^2

A = l + b

What is the circumference of a circle with a radius of 4 cm?

20π cm

8π cm

16π cm (correct)

24π cm

What is the area of a circle with a radius of 5 cm?

25π cm^2 Signup and view all the answers

What is the conversion factor from cm to mm?

× 10 Signup and view all the answers

What is the perimeter of a rectangle with a length of 6 cm and a breadth of 4 cm?

20 cm Signup and view all the answers

What is the area of a square with a side length of 8 cm?

64 cm^2 Signup and view all the answers

What is the main difference between perimeter and area?

Perimeter measures the boundary length, area measures the surface covered Signup and view all the answers

What is the perimeter of a square with a side length of 3 cm?

12 cm Signup and view all the answers

What is the area of a rectangle with a length of 5 cm and a breadth of 3 cm?

15 cm² Signup and view all the answers

What is the circumference of a circle with a diameter of 14 cm?

44 cm Signup and view all the answers

What is the area of a circle with a radius of 7 cm?

154 cm² Signup and view all the answers

What is the perimeter of a rectangle with a length of 8 cm and a breadth of 6 cm?

24 cm Signup and view all the answers

What is the conversion factor from m² to cm²?

10,000 Signup and view all the answers

What is the area of a triangle with a base of 5 cm and a height of 6 cm?

15 cm² Signup and view all the answers

What is the perimeter of a composite shape made up of two identical rectangles with a length of 4 cm and a breadth of 3 cm?

28 cm Signup and view all the answers

What is the perimeter of a rectangle with a length of 10 cm and a breadth of 8 cm?

40 cm Signup and view all the answers

What is the area of a triangle with a base of 8 cm and a height of 12 cm?

48 cm² Signup and view all the answers

What is the circumference of a circle with a diameter of 20 cm?

62.8 cm Signup and view all the answers

What is the area of a composite shape made up of two identical squares with a side length of 6 cm?

96 cm² Signup and view all the answers

What is the conversion factor from km² to m²?

1,000,000 Signup and view all the answers

What is the perimeter of a square with a side length of 9 cm?

45 cm Signup and view all the answers

What is the area of a circle with a radius of 9 cm?

254.34 cm² Signup and view all the answers

What is the conversion factor from m to cm?

100 Signup and view all the answers

A rectangular garden measures 20 m by 15 m. What is the cost of fencing it, if the cost of fencing is ₹ 50 per meter?

₹ 2000 Signup and view all the answers

A circle has a circumference of 44 cm. What is the area of the circle?

154 cm² Signup and view all the answers

A square has an area of 144 cm². What is the perimeter of the square?

48 cm Signup and view all the answers

A rectangular piece of paper has a length of 20 cm and a breadth of 15 cm. If a rectangular strip of width 2 cm is cut from it, what is the area of the remaining piece of paper?

270 cm² Signup and view all the answers

A circular garden has a diameter of 14 m. If a path of width 2 m is constructed around the garden, what is the area of the path?

32π m² Signup and view all the answers

A triangle has a base of 10 cm and a height of 12 cm. What is the area of the triangle?

60 cm² Signup and view all the answers

A rectangular shape is formed by combining two identical rectangles, each with a length of 8 cm and a breadth of 5 cm. What is the perimeter of the combined shape?