A circle is a curve sketched out by a point moving in a plane. The arc length of the semicircle is 18.85 units or 6π units.
What is a circle?
A circle is a curve sketched out by a point moving in a plane so that its distance from a given point is constant; alternatively, it is the shape formed by all points in a plane that are at a set distance from a given point, the centre.
The length of the arc on any semicircle is half the length of the circumference of the circle with the same radius.
Given the length of the diameter of the semicircle is 12 units. Therefore, the circumference of the circle with a diameter of 12 units is,
Circumference = π × Diameter
= π × 12 units
= 12π units
Now, the arc length of the semicircle is,
Length of the semicircle = Circumference /2
= 12π /2 units
= 6π units
= 18.85 units
Hence, the arc length of the semicircle is 18.85 units or 6π units.
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