7.3b: Radius, Diameter, Circumference

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 relationship between radius and diameter?

Back

Diameter = 2 × Radius.

Tags

CCSS.7.G.B.4

Front

What is the value of pi (π) approximately?

Back

3.14.

Tags

CCSS.HSG.GMD.A.1

Front

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

Back

10 inches.

Tags

CCSS.7.G.B.4

Front

If the diameter of a circle is 12 inches, what is the radius?

Back

6 inches.

Tags

CCSS.7.G.B.4

Front

What is the circumference of a circle with a radius of 3 inches?

Back

Circumference = 2 × π × 3 = 6π ≈ 18.84 inches.

Tags

CCSS.7.G.B.4

Front

What does 'squared' mean in mathematics?

Back

To square a number means to multiply it by itself.

Front

If the circumference of a circle is 31.4 inches, what is the diameter?

Back

Diameter = Circumference / π = 31.4 / 3.14 = 10 inches.

Tags

CCSS.7.G.B.4

Front

What is the area of a circle with a radius of 4 inches?

Back

Area = π × Radius² = π × 4² = 16π ≈ 50.27 square inches.

Tags

CCSS.7.G.B.4

Front

How do you convert diameter to radius?

Back

Divide the diameter by 2.

Tags

CCSS.7.G.B.4