Circumference and Area of Circles

Front

What is the diameter of a circle?

Back

The distance from an edge of a circle to another edge through the center.

Front

What is the formula for the circumference of a circle?

Back

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

Tags

CCSS.7.G.B.4

Front

What is the formula for the area of a circle?

Back

Area = π × radius².

Tags

CCSS.7.G.B.4

Front

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

Back

Area = π × (7 cm)² = 153.94 cm².

Tags

CCSS.7.G.B.4

Front

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

Back

Circumference = π × 10 m ≈ 31.42 m.

Tags

CCSS.7.G.B.4

Front

How do you find the radius of a circle if you know the diameter?

Back

Radius = diameter ÷ 2.

Tags

CCSS.7.G.B.4

Front

What is the relationship between diameter and radius?

Back

The diameter is twice the length of the radius.

Tags

CCSS.7.G.B.4

Front

If a circle has a circumference of 62.83 m, what is its diameter?

Back

Diameter = Circumference ÷ π ≈ 20 m.

Tags

CCSS.7.G.B.4

Front

What is the circumference of a circle with a diameter of 56 m?

Back

Circumference = 175.8 m.

Tags

CCSS.7.G.B.4

Front

What is the area of a circle with a radius of 10 in?

Back

Area = π × (10 in)² ≈ 314.16 in².

Tags

CCSS.7.G.B.4