Exploring Circle Areas

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

• 160.00 cm²

• 154.00 cm²

• 153.94 cm²

• 150.00 cm²

If the area of a circle is 50.24 cm², what is its radius?

• 6 cm

• 4 cm

• 5 cm

• 3 cm

Calculate the area of a circle with a diameter of 10 m.

• 100 m²

• 31.4 m²

• 50 m²

• 78.5 m²

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

• 12π square meters

• 8π square meters

• 20π square meters

• 16π square meters

Convert the area of a circle from 100 cm² to m².

• 1 m²

• 0.01 m²

• 0.1 m²

• 10 m²

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

• The area decreases by a factor of 2.

• The area remains the same.

• The area increases by a factor of 3.

• The area increases by a factor of 4.

A circular pond has a circumference of 31.4 m. What is its area?

• 78.5 m²

• 100.0 m²

• 62.8 m²

• 50.3 m²

Find the area of a circle inscribed in a square with a side length of 8 m.

• 8π m²

• 32 m²

• 16π m²

• 64 m²

If the area of a circle is 78.5 m², what is the diameter?

• 10 m

• 20 m

• 15 m

• 5 m

Graph the equation of a circle with center (2, -3) and radius 5 on the coordinate plane.

• (x - 2)² + (y - 3)² = 5

• (x + 2)² + (y - 3)² = 25

• (x - 2)² + (y + 3)² = 20

• The equation of the circle is (x - 2)² + (y + 3)² = 25.