A circle has a diameter of 10 cm. What is the radius?

The diameter of a circle is a line segment that passes through the centre of the circle and has endpoints on the circle itself. In this case, the diameter of the circle is given as 10 cm. To find the radius of the circle, we need to remember that the radius is half the length of the diameter. Therefore, to calculate the radius of this circle, we simply need to divide the diameter by 2. 

By dividing the diameter of 10 cm by 2, we can determine that the radius of the circle is 5 cm. The radius is the distance from the centre of the circle to any point on the circle itself. It is a crucial measurement when working with circles, as it helps determine the circumference, area, and other properties of the circle. In this case, knowing that the radius is 5 cm allows us to further analyse and work with this particular circle.

Understanding the relationship between the diameter and radius of a circle is fundamental in geometry and mathematics. By knowing that the radius is half the length of the diameter, we can easily calculate one measurement if the other is given. In this scenario, with a diameter of 10 cm, we found that the radius is 5 cm. This knowledge can be applied in various mathematical problems and real-life situations involving circles.

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