Radius and Diameter

Front

What is the definition of the radius of a circle?

Back

The radius of a circle is the measurement from the center of the circle to an edge of the circle.

Front

What is the definition of the diameter of a circle?

Back

The diameter of a circle is the measurement from one edge of the circle to the opposite edge, passing through the center.

Front

If the radius of a circle is 6 cm, what is the diameter?

Back

The diameter is 12 cm (Diameter = 2 x Radius).

Front

What is the relationship between radius and diameter?

Back

The diameter is twice the length of the radius (Diameter = 2 x Radius).

Front

If a circle has a diameter of 24 ft, what is the radius?

Back

The radius is 12 ft (Radius = Diameter / 2).

Front

Is a line segment from the center to the edge of a circle a radius or diameter?

Back

It is a radius.

Front

What is the radius of a circle with a diameter of 10 m?

Back

The radius is 5 m.

Front

If the radius of a circle is 4 inches, what is the circumference? (Use C = 2πr)

Back

The circumference is approximately 25.13 inches.

Front

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

Back

The area of a circle is A = πr².

Front

If the radius of a circle is 3 m, what is the area?

Back

The area is approximately 28.27 m².