Circles: circumference and area

Question 1 of 10

Find the area of a circle of radius 3.5 cm. (Take π = 22/7.)

Question 2 of 10

The diameter is the longest chord of a circle.

Question 3 of 10

The formula for the circumference of a circle is

Question 4 of 10

The circumference of a circle is 22 cm. Find its radius. (Take π = 22/7.)

Question 5 of 10

The circumference of a circle of diameter 14 cm is 44 cm (π = 22/7).

Question 6 of 10

A circular pond has a radius of 21 m. A path 2 m wide surrounds it. Taking π = 22/7, find (a) the area of the pond, (b) the area of the pond and path together, (c) the area of the path alone, (d) the length of fencing needed round the outer edge of the path.

Question 7 of 10

π is approximately 3.142.

Question 8 of 10

A semicircle is half of a circle.

Question 9 of 10

A wheel has a diameter of 14 cm. The distance it moves in one complete turn is ___ cm. (Take π = 22/7.)

Question 10 of 10

The circumference of a circle is 132 cm. Find its radius. (Take π = 22/7.)