Sudhanshu divides a circular disc of radius 7 cm into two equal parts. What is the perimeter of each semicircular piece? (show working too)

Question

asked Aug 25, 2024 30.2k views

1 Answer

Safakeskin · Answer 1 · 2024-08-28T17:20:16+0000

Given that radius (r) = 7 cm.

We know that the circumference of the circle =
$2\pi r$

So, the circumference of the semicircle =
$(1)/(2) *2\pi r=\pi r$

$=(22)/(7) *7 \ \text{cm}$

$=22 \ \text{cm}$

So, the diameter of the circle =
$2r=2*7 \ \text{cm}=14 \ \text{cm}$

Thus, the perimeter of each semicircular dis =
$22 \ \text{cm}+14 \ \text{cm}=36 \ \text{cm}$ .