Area of a circle

Front

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

Back

Area = π × r², where r is the radius.

Tags

CCSS.7.G.B.4

Front

If a circle has a radius of 7 feet, what is its area?

Back

Area = π × (7)² ≈ 153.94 ft².

Tags

CCSS.7.G.B.4

Front

What is the relationship between diameter and radius?

Back

Diameter = 2 × Radius.

Tags

CCSS.7.G.B.4

Front

If the diameter of a circle is 20 inches, what is the radius?

Back

Radius = Diameter ÷ 2 = 10 inches.

Tags

CCSS.7.G.B.4

Front

What is the circumference of a circle?

Back

Circumference = π × Diameter.

Tags

CCSS.7.G.B.4

Front

If a circle has a circumference of 31.4 cm, what is its diameter?

Back

Diameter = Circumference ÷ π ≈ 10 cm.

Tags

CCSS.7.G.B.4

Front

What does the term 'radius' refer to in a circle?

Back

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

Front

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

Back

Area = π × (10)² ≈ 314.16 m².

Tags

CCSS.7.G.B.4

Front

What is the difference between area and circumference?

Back

Area measures the space inside the circle, while circumference measures the distance around it.

Front

If the radius of a circle is doubled, how does the area change?

Back

The area increases by a factor of four.

Tags

CCSS.7.G.B.4