Circles

Front

What is the radius of a circle with a diameter of 10 ft?

Back

5 ft.

Front

What do you get when you multiply 2 by the radius (r) of a circle?

Back

Diameter

Front

What is the formula for the circumference of a circle with a radius of 5 ft?

Back

π(10)

Front

What is the diameter of a circle with a radius of 16 ft?

Back

32 ft.

Front

What is the distance across the circle through the center called?

Back

Diameter

Front

If the radius of a circle is 7 ft, what is the diameter?

Back

14 ft.

Front

What is the circumference of a circle with a radius of 3 ft?

Back

π(6) or approximately 18.85 ft.

Front

If a circle has a diameter of 12 ft, what is the radius?

Back

6 ft.

Front

What is the relationship between diameter and radius?

Back

Diameter = 2 × Radius

Front

What is the formula for the area of a circle?

Back

Area = π × (radius)²