Area of a Circle

Front

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

Back

A = πr²

Tags

CCSS.7.G.B.4

Front

What is the area of a circle with a radius of 15 cm? (use 3.14 for π)

Back

113.04 cm²

Tags

CCSS.7.G.B.4

Front

What is the radius of a circle if the area is 113.04 cm²? (use 3.14 for π)

Back

15 cm

Tags

CCSS.7.G.B.4

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 circumference of a circle with a diameter of 10 cm? (use 3.14 for π)

Back

31.4 cm

Tags

CCSS.7.G.B.4

Front

What is the relationship between diameter and radius?

Back

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

Tags

CCSS.7.G.B.4

Front

What is the area of a circle with a circumference of 31.4 cm? (use 3.14 for π)

Back

50.24 cm²

Tags

CCSS.7.G.B.4

Front

What does π (pi) represent in the context of circles?

Back

π is a constant approximately equal to 3.14, representing the ratio of the circumference of a circle to its diameter.

Tags

CCSS.HSG.GMD.A.1

Front

How do you calculate the area of a circle if you know the diameter?

Back

Use the formula A = π(r²), where r = d/2.

Tags

CCSS.7.G.B.4

Front

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

Back

C = 2πr.

Tags

CCSS.7.G.B.4