Circumference and Pi

Front

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

Back

Circumference = 2 × π × radius

Tags

CCSS.7.G.B.4

Front

What is the value of π (Pi) approximately?

Back

π (Pi) is approximately 3.14.

Tags

CCSS.HSG.GMD.A.1

Front

If the radius of a circle is 7 cm, what is the diameter?

Back

Diameter = 2 × radius = 2 × 7 cm = 14 cm.

Tags

CCSS.7.G.B.4

Front

What is the relationship between diameter and radius?

Back

Diameter is twice the radius.

Tags

CCSS.7.G.B.4

Front

What is the circumference of a circle with a radius of 5 cm?

Back

Circumference = 2 × π × 5 cm ≈ 31.4 cm.

Tags

CCSS.7.G.B.4

Front

What does the term 'radius' refer to in a circle?

Back

The radius is the distance from the center of the circle to any point on its edge.

Front

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

Back

Radius = Diameter ÷ 2.

Tags

CCSS.7.G.B.4

Front

What is the diameter of a circle with a circumference of 31.4 cm?

Back

Diameter = Circumference ÷ π ≈ 10 cm.

Tags

CCSS.7.G.B.4

Front

What is the definition of circumference?

Back

Circumference is the distance around a circle.

Tags

CCSS.7.G.B.4

Front

If a circle has a diameter of 20 cm, what is its radius?

Back

Radius = Diameter ÷ 2 = 20 cm ÷ 2 = 10 cm.

Tags

CCSS.7.G.B.4