Parts of Circles

Front

What is the distance from the center of a circle to any point on its edge called?

Back

Radius

Front

What is the distance around a circle called?

Back

Circumference

Tags

CCSS.7.G.B.4

Front

What is the longest distance across a circle, passing through the center, called?

Back

Diameter

Front

What is the formula for the area of a circle?

Back

Tags

CCSS.7.G.B.4

Front

If the radius of a circle is 3 cm, what is the circumference?

Back

Tags

CCSS.7.G.B.4

Front

What part of a circle is defined as the region enclosed by the circle?

Back

Area

Front

If the diameter of a circle is 10 cm, what is the radius?

Back

5 cm (since radius is half of the diameter).

Tags

CCSS.7.G.B.4

Front

What is the relationship between diameter and radius?

Back

Diameter is twice the radius (d = 2r).

Tags

CCSS.7.G.B.4

Front

What is the formula to find the circumference of a circle using diameter?

Back

Tags

CCSS.7.G.B.4

Front

What is the term for a straight line that touches a circle at exactly one point?

Back

Tangent