Circles Review

Front

Radius + Radius = ?

Back

Diameter

Front

This shape is called an ____________. It looks like a squashed circle.

Back

ellipse

Front

What is the radius of this circle? (Circle with radius 6cm)

Back

6cm

Front

The distance around a circle is called the ______.

Back

circumference

Front

If the diameter of this circle is 6 ft, what is the radius?

Back

3 ft.

Front

What is the formula for the circumference of a circle?

Back

C = πd or C = 2πr

Front

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

Back

10 cm

Front

What do you call a line segment that passes through the center of a circle and has endpoints on the circle?

Back

Diameter

Front

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

Back

16π cm²

Front

What is the relationship between the radius and diameter?

Back

Diameter = 2 × Radius