Radius and Diameter Flashcard

Front

What is the radius of a circle?

Back

The radius of a circle 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 of a circle is the distance across the circle, passing through the center. It is twice the length of the radius.

Front

If a circle has a diameter of 14 meters, what is its radius?

Back

7 meters

Front

If a circle has a radius of 8 centimeters, what is its diameter?

Back

16 centimeters

Front

Why is the diameter always twice the radius?

Back

Because the diameter measures the full width of the circle, while the radius measures only half of that width.

Front

What is the relationship between radius and diameter?

Back

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

Front

A circle has a radius of 5 inches. What is its diameter?

Back

10 inches

Front

Identify the radius and diameter of a circle with a diameter of 10 cm.

Back

Radius: 5 cm, Diameter: 10 cm

Front

What is the formula to find the diameter if the radius is known?

Back

Diameter = 2 x Radius

Front

What is the formula to find the radius if the diameter is known?

Back

Radius = Diameter / 2