area of 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

What is the relationship between diameter and radius?

Back

The radius is half of the diameter.

Tags

CCSS.7.G.B.4

Front

If the radius of a circle is 5 cm, what is its area?

Back

Area = π × (5 cm)² = 78.54 cm².

Tags

CCSS.7.G.B.4

Front

What is the value of π (pi) approximately?

Back

π is approximately 3.14.

Tags

CCSS.HSG.GMD.A.1

Front

How do you convert diameter to radius?

Back

Divide the diameter by 2.

Tags

CCSS.7.G.B.4

Front

What is the area of a circle with a radius of 7 m?

Back

Area = π × (7 m)² = 153.94 m².

Tags

CCSS.7.G.B.4

Front

If the area of a circle is 314.16 m², what is the radius?

Back

Radius = √(Area/π) = √(314.16/π) ≈ 10 m.

Tags

CCSS.7.G.B.4

Front

What happens to the area of a circle if the radius is doubled?

Back

The area increases by a factor of 4.

Tags

CCSS.7.G.B.4

Front

What is the diameter of a circle with an area of 78.50 m²?

Back

Diameter = 2 × √(Area/π) ≈ 10 m.

Tags

CCSS.7.G.B.4

Front

If a circle has a diameter of 8 cm, what is its area?

Back

Area = π × (4 cm)² = 50.27 cm².

Tags

CCSS.7.G.B.4