Circumference of Circles

Front

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

Back

Circumference = π × diameter (C = πd) or Circumference = 2 × π × radius (C = 2πr)

Tags

CCSS.7.G.B.4

Front

If the diameter of a circle is 90 cm, what is the circumference?

Back

282.6 cm

Tags

CCSS.7.G.B.4

Front

What is the approximate circumference of a circle with a diameter of 50 mm using π = 3.14?

Back

157 mm

Tags

CCSS.7.G.B.4

Front

What is the circumference of a circle with a diameter of 92 inches?

Back

288.88 inches

Tags

CCSS.7.G.B.4

Front

What does 'circumference' mean?

Back

Distance around a circle.

Front

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

Back

20 ft

Tags

CCSS.7.G.B.4

Front

What is the value of π (pi) approximately?

Back

3.14

Tags

CCSS.HSG.GMD.A.1

Front

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

Back

Diameter = Circumference / π (d = C/π)

Tags

CCSS.7.G.B.4

Front

What is the relationship between radius and diameter?

Back

Diameter = 2 × radius (d = 2r)

Tags

CCSS.7.G.B.4

Front

If a circle has a circumference of 62.8 ft, what is its diameter?

Back

20 ft

Tags

CCSS.7.G.B.4