Circles Circles Circles

Front

What is the area of a circle?

Back

The space inside the circle.

Front

What does r represent in the formula A = π·r²?

Back

radius

Tags

CCSS.7.G.B.4

Front

What number does π represent?

Back

3.14

Tags

CCSS.HSG.GMD.A.1

Front

Which segment is the diameter of a circle?

Back

The longest chord that passes through the center.

Front

Find the area of the circle with radius 3 cm.

Back

28.26 cm².

Tags

CCSS.7.G.B.4

Front

What is the formula for the circumference of a circle?

Back

C = 2·π·r.

Tags

CCSS.7.G.B.4

Front

What is the diameter of a circle?

Back

A line from one side of the circle to the other, passing through the center.

Front

If the radius of a circle is doubled, what happens to the area?

Back

The area becomes four times larger.

Tags

CCSS.7.G.B.4

Front

What is the relationship between diameter and radius?

Back

Diameter is twice the radius (D = 2·r).

Tags

CCSS.7.G.B.4

Front

What is a chord in a circle?

Back

A line segment with both endpoints on the circle.