The perimeter of a semi-circle is ____.
Half of Radius
Half of Diameter
Half of Circumference
Twice of Circumference
The perimeter of a circle is called the circumference. Semi-circle is half of the circle and its circumference is half of the circle’s circumference.
If the perimeter of a semi-circle is 144 cm, then the area of the semi-circle is 1232 cm2.