The diameter of a semicircle is 2 centimeters. What is the semicircle's radius?

Answer 1

The radius of a circle is half of its diameter. Therefore, the radius of a semicircle is half of the diameter of the corresponding circle.

In this case, the diameter of the semicircle is 2 centimeters. The corresponding circle would have a diameter of 4 centimeters.

The radius of the circle (and thus the semicircle) is half of the diameter:

radius = 4 cm / 2 = 2 cm

Therefore, the radius of the semicircle is 2 centimeters.