Area of a Circle

Front

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

Back

50.24 cm²

Tags

CCSS.7.G.B.4

Front

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

Back

A = \(\pi r^2\)

Tags

CCSS.7.G.B.4

Front

What is the formula for circumference of a circle?

Back

C = \(2\pi r\) or C = \(\pi d\)

Tags

CCSS.7.G.B.4

Front

What is the area of a circle with a radius of 6 cm? (use 3.14 for \(\pi\))

Back

113.04 cm²

Tags

CCSS.7.G.B.4

Front

What is the radius of a circle with an area of 706.5 cm²? (use 3.14 for \(\pi\))

Back

15 cm

Tags

CCSS.7.G.B.4

Front

What does \(\pi\) represent in circle calculations?

Back

\(\pi\) is a constant approximately equal to 3.14, representing the ratio of the circumference to the diameter of a circle.

Tags

CCSS.HSG.GMD.A.1

Front

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

Back

5 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

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

Back

Use the formula: A = \(\pi (\frac{d}{2})^2\)

Tags

CCSS.7.G.B.4

Front

What is the area of a circle with a diameter of 10 cm? (use 3.14 for \(\pi\))

Back

78.5 cm²

Tags

CCSS.7.G.B.4