Question

A circular disc of radius 28 is divided into two parts. what is the perimeter of each some circular shape disc​

Answer 1

Answer: 144

Step-by-step explanation:

semi circle perimeter  = perimeter of half circle + diameter

                                    $= \pi r +2r\\\\= 28*\frac{22}{7} +2*28\\\\= 4*22 +2*28\\\\= 88+56\\\\=144$