Question

find perimeter of semicircular plate of radius 3.85 cm​

Answer 1

perimeter of semicircle is the

π r /2

=22/7×3.85/2= 6.05cm sq. this is answer

Answer 2

R=3.85

perimeter of the circle =2π

therefore the length of the curve of

semi circle=2π/2=πr=12.095cm

perimeter of the semicircle= length of

the curve of semicircle + diameter

=12.095+2(3.85)=12.095+77=19.795.