Exploring Circle Areas and Properties

What is the area of a circle with a radius of 5 cm?

• 78.5 cm²

• 100 cm²

• 50 cm²

• 31.4 cm²

Tags

CCSS.7.G.B.4

If π is approximately 3.14, what is the area of a circle with a diameter of 10 cm?

• 31.4 cm²

• 50 cm²

• 100 cm²

• 78.5 cm²

Tags

CCSS.7.G.B.4

Convert a radius of 7 cm to its diameter.

• 14 cm

• 10 cm

• 12 cm

• 16 cm

Tags

CCSS.7.G.B.4

A circle has a radius of 4 m. What is its area?

• 8π square meters

• 16π square meters

• 12π square meters

• 20π square meters

Tags

CCSS.7.G.B.4

If the area of a circle is 78.5 cm², what is its radius?

• 7 cm

• 6 cm

• 5 cm

• 4 cm

Tags

CCSS.7.G.B.4

What is the relationship between the radius and diameter of a circle?

• The diameter is half the radius.

• The diameter is twice the radius.

• The radius and diameter are equal.

• The radius is twice the diameter.

Tags

CCSS.7.G.B.4

Calculate the area of a circle with a radius of 3.5 m using π = 3.14.

• 28.26 m²

• 38.465 m²

• 40.84 m²

• 31.42 m²

Tags

CCSS.7.G.B.4

A circular garden has a diameter of 12 ft. What is its area?

• 48π ft²

• 36π ft²

• 24π ft²

• 18π ft²

Tags

CCSS.7.G.B.4

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

• The area increases by a factor of 3.

• The area increases by a factor of 4.

• The area decreases by a factor of 2.

• The area remains the same.

Tags

CCSS.7.G.B.4

A circular pond has an area of 50.24 m². What is the radius?

• 3 m

• 6 m

• 5 m

• 4 m

Tags

CCSS.7.G.B.4