Circumference of a Circle

Front

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

Back

Circumference = π × diameter or Circumference = 2 × π × radius.

Tags

CCSS.7.G.B.4

Front

What is the diameter of a circle?

Back

The diameter is the distance across the circle through its center, equal to twice the radius.

Tags

CCSS.HSG.C.A.2

Front

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

Back

Diameter = 2 × radius = 2 × 5 mm = 10 mm.

Tags

CCSS.7.G.B.4

Front

What is the relationship between radius and diameter?

Back

The diameter is twice the length of the radius.

Tags

CCSS.7.G.B.4

Front

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

Back

Radius = Circumference / (2 × π).

Tags

CCSS.7.G.B.4

Front

What is π (pi)?

Back

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

Tags

CCSS.HSG.GMD.A.1

Front

Calculate the circumference of a circle with a diameter of 11 mm.

Back

Circumference = π × 11 mm ≈ 34.6 mm.

Tags

CCSS.7.G.B.4

Front

What is the radius of a circle with a diameter of 16 mm?

Back

Radius = Diameter / 2 = 16 mm / 2 = 8 mm.

Tags

CCSS.7.G.B.4

Front

If a circle has a circumference of 50.24 mm, what is its diameter?

Back

Diameter = Circumference / π ≈ 50.24 mm / 3.14 ≈ 16 mm.

Tags

CCSS.7.G.B.4

Front

What is the circumference of a circle with a radius of 9.5 mm?

Back

Circumference = 2 × π × 9.5 mm ≈ 59.66 mm.

Tags

CCSS.7.G.B.4