Circumference

Front

What is the circumference of a circle?

Back

The distance around the circle.

Tags

CCSS.7.G.B.4

Front

What is the formula to calculate the circumference of a circle?

Back

C = π·d, where C is the circumference and d is the diameter.

Tags

CCSS.7.G.B.4

Front

What does the symbol π (Pi) represent?

Back

Pi is a constant approximately equal to 3.14, used in calculations involving circles.

Tags

CCSS.HSG.GMD.A.1

Front

What is the diameter of a circle?

Back

The distance across the circle through its center.

Front

What is the radius of a circle?

Back

The distance from the center of the circle to any point on its circumference.

Front

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

Back

C = π·d = π·10 cm ≈ 31.4 cm.

Tags

CCSS.7.G.B.4

Front

How do you find the radius if you know the circumference?

Back

Radius = Circumference / (2π).

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

If the circumference of a circle is 62.8 cm, what is the diameter?

Back

Diameter = Circumference / π ≈ 20 cm.

Tags

CCSS.7.G.B.4

Front

What is the area of a circle?

Back

Area = π·r², where r is the radius.

Tags

CCSS.7.G.B.4