Radius, Diameter, and Circumference of circles

Front

What is the radius of a circle?

Back

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

Front

What is the diameter of a circle?

Back

The diameter is the distance across the circle, passing through the center. It is twice the length of the radius.

Tags

CCSS.HSG.C.A.2

Front

How do you calculate the circumference of a circle?

Back

Circumference can be calculated using the formula: Circumference = π × diameter or Circumference = 2 × π × radius.

Tags

CCSS.7.G.B.4

Front

If the radius of a circle is 5 ft, what is the diameter?

Back

10 ft

Tags

CCSS.7.G.B.4

Front

If the diameter of a circle is 30 cm, what is the radius?

Back

15 cm

Tags

CCSS.7.G.B.4

Front

What is the value of π (pi) approximately?

Back

π is approximately 3.14.

Tags

CCSS.HSG.GMD.A.1

Front

What is the circumference of a circle with a diameter of 10 cm?

Back

31.4 cm

Tags

CCSS.7.G.B.4

Front

If a circular pool has a radius of 7 ft, what is its circumference?

Back

43.96 ft

Tags

CCSS.7.G.B.4

Front

What is the relationship between radius and diameter?

Back

The diameter is always twice the radius.

Tags

CCSS.7.G.B.4

Front

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

Back

20 cm

Tags

CCSS.7.G.B.4