Circles Word Problems (Circumference, Area) & Thansgiving Trivia

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 5 cm, what is the circumference?

Back

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

Tags

CCSS.7.G.B.4

Front

If the diameter of a circle is 10 inches, what is the radius?

Back

Radius = diameter ÷ 2 = 10 inches ÷ 2 = 5 inches.

Tags

CCSS.7.G.B.4

Front

What do you need to calculate to find out how much paint is needed for a circular area?

Back

You need to calculate the area.

Front

What is the relationship between diameter and radius?

Back

Diameter = 2 × radius.

Tags

CCSS.7.G.B.4

Front

What is π (pi) approximately equal to?

Back

π is approximately equal to 3.14.

Tags

CCSS.HSG.GMD.A.1

Front

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

Back

Diameter = Circumference ÷ π ≈ 62.8 cm ÷ 3.14 ≈ 20 cm.

Tags

CCSS.7.G.B.4

Front

What is the diameter of a circle with a radius of 7 cm?

Back

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

Tags

CCSS.7.G.B.4

Front

What is the area of a circle with a radius of 3 m?

Back

Area = π × (3 m)² ≈ 28.26 m².

Tags

CCSS.7.G.B.4