Radius, Diameter, and Circumference of a circle.

Front

What is the definition of a circle?

Back

A circle is a shape consisting of all points in a plane that are at a given distance (radius) from a fixed point (center).

Front

What is the radius of a circle?

Back

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

Front

What is the diameter of a circle?

Back

The diameter is the distance across the circle through its center, equal to twice the radius.

Front

What is the formula for the circumference of a circle?

Back

The circumference (C) can be calculated using the formula: C = 2 * π * r, where r is the radius.

Front

What is the value of π (pi) approximately?

Back

π (pi) is approximately equal to 3.14.

Front

If the radius of a circle is 4 cm, what is the diameter?

Back

The diameter is 8 cm, calculated as 2 * radius.

Front

If the diameter of a circle is 100 cm, what is the radius?

Back

The radius is 50 cm, calculated as diameter / 2.

Front

What is the circumference of a circle with a radius of 4 cm?

Back

The circumference is 25.12 cm, calculated as C = 2 * π * 4 = 25.12 cm.

Front

What is the circumference of a circle with a diameter of 100 cm?

Back

The circumference is 314 cm, calculated as C = π * 100 = 314 cm.

Front

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

Back

You can find the radius using the formula: r = C / (2 * π).