Question

Find the circumference of the circle above. Use 3.14 for and round to the nearest tenth.

Answer 1

The radius of a circle is 1.8 m. Find the circumference
to

the

nearest

tenth
to the nearest tenth

Answer 2

The diameter of a circle is 7 m. Find the circumference
to

the

nearest

tenth
to the nearest tenth.

Answer 3

The radius of a circle is 19 in. Find its area in terms of
�
π.

Answer 4

The circumference of a circle is given by the formula:

C = 2πr

where π is approximately 3.14 and r is the radius.

Substituting r = 1.8 m, we get:

C = 2π(1.8) ≈ 11.3

To the nearest tenth, the circumference of the circle is 11.3 meters.

Answer 5

The circumference of a circle is given by the formula:

C = πd

where π is approximately 3.14 and d is the diameter.

Substituting d = 7 m, we get:

C = 3.14(7) ≈ 22.0

To the nearest tenth, the circumference of the circle is 22.0 meters.

Answer 6

The area of a circle is given by the formula:

A = πr^2

where π is the constant ratio of the circle's circumference to its diameter, and r is the radius.

Substituting r = 19 in, we get:

A = π(19)^2
= π(361)
= 361π square inches

Therefore, the area of the circle in terms of π is 361π square inches.