Question

Perimeter of SEMI circle is 72m. Find it's radius and area

Answer 1

Answer:

The radius of the semi circle is 22.92 m.

The area of the semi circle is 824.76 m².

Step-by-step explanation:

The perimeter of a semi-circle is, $P = \pi r$

Here r = radius.

Determine the value of r as follows:

$P = \pi r\\72=\pi \times r\\r=\frac{72}{\pi } \\=22.92$

Thus, the radius of the semi circle is 22.92 m.

Area of a semi circle is,

$A=\frac{\pi r^{2}}{2}\\=\frac{\pi \times (22.92)^{2}}{2}\\=824.76$

Thus, the area of the semi circle is 824.76 m².