Area of a Circle

Front

What is the diameter of a circle?

Back

A line segment that passes through the center of the circle and whose endpoints lie on the edge/circumference of the circle.

Front

What is the formula for the area of a circle given the radius?

Back

A = πr²

Tags

CCSS.7.G.B.4

Front

What is the radius of a circle?

Back

A line segment drawn from the center of a circle to the edge/circumference of the circle.

Front

Calculate the area of a circle with a radius of 6 using π = 3.14.

Back

113.04

Tags

CCSS.7.G.B.4

Front

What is the circumference of a circle?

Back

The distance around the circle, calculated as C = 2πr.

Tags

CCSS.7.G.B.4

Front

What does π (pi) represent in circle calculations?

Back

A constant approximately equal to 3.14, used in formulas for circumference and area of a circle.

Tags

CCSS.HSG.GMD.A.1

Front

If the radius of a circle is doubled, how does the area change?

Back

The area increases by a factor of four.

Tags

CCSS.7.G.B.4

Front

What is the relationship between diameter and radius?

Back

The diameter is twice the length of the radius (d = 2r).

Tags

CCSS.7.G.B.4

Front

What is the area of a circle with a diameter of 10?

Back

78.5 (using π = 3.14).

Tags

CCSS.7.G.B.4

Front

What is the formula for the circumference of a circle?

Back

C = πd or C = 2πr.

Tags

CCSS.7.G.B.4