Parts of a Circle ,Area and Circumference of a Circle

Front

What part of a circle does the red line represent?

Back

the diameter

Front

Find the area of the circle.

Back

176.6 cm²

Front

_____________ is half of the diameter.

Back

radius

Front

What is the distance around a circle called?

Back

the circumference

Front

Which is the correct formula for the area of a circle?

Back

A = π r²

Front

What is the formula for the circumference of a circle?

Back

C = 2π r

Front

What is the radius of a circle?

Back

The distance from the center to any point on the circle.

Front

What is the diameter of a circle?

Back

The distance across the circle through the center, equal to twice the radius.

Front

If the radius of a circle is 7 cm, what is the area?

Back

154 cm² (A = π r² = π (7)²)

Front

If the circumference of a circle is 31.4 cm, what is the radius?

Back

5 cm (C = 2π r, r = C / (2π))