Question

Perimeter of semi circle Whose radius is 10.5

Answer 1

$perimeter \: of \: semicircle \: = \pi \times r$
$= 22 \times 10 .5 \div 7$
$33cm$

Answer 2

Hey there
The perimeter of semi circle is 1/2× 2πr
Radius = 10.5
Putting value in formula
1/2× 2 × 22/7× 10.5
= 33
Hope it helps