Bimbel Khanza

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

• A = 2πr

• A = r²/2

• A = πr²

• A = πd

If the radius of a circle is 7 cm, what is its area?

• Approximately 100.00 cm²

• Approximately 153.86 cm²

• Approximately 200.00 cm²

• Approximately 50.24 cm²

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

• C = π * d

• C = 2 * r

• C = π * r^2

• C = 2 * π * r

If the diameter of a circle is 10 cm, what is its circumference?

• 31.42 cm

• 40.84 cm

• 15.70 cm

• 25.12 cm

Explain what a circle is in your own words.

• A circle is a polygon with three sides.

• A circle is a flat shape with corners.

• A circle is a round shape with all points on its edge equidistant from its center.

• A circle is a shape that has only one point.

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

• The diameter is half the radius.

• The radius is twice the diameter.

• The diameter is twice the radius.

• The radius and diameter are equal.

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

• 12 cm

• 8 cm

• 15 cm

• 10 cm

How do you find the radius if you know the circumference?

• r = C / (2π)

• r = C / π

• r = C / (π^2)

• r = 2C

What is the value of π (pi) approximately?

• 3.00

• 3.14

• 3.5

• 2.14

If a circle has a diameter of 12 cm, what is its radius?

• 6 cm

• 8 cm

• 4 cm

• 10 cm