Question

Find the perimeter of semicircular disc
of diameter 30.8 CM

Answer 1

The perimeter of a semicircle is half of that of the circle . So perimeter is 2 pi r /2 which is pi r . If diameter is 30.8 then radius is half of 30.8 which is 15.4 . So
We can write 2*3.14*15.4=96.712cm

Answer 2

Answer:

193.6

Step-by-step explanation:

the perimeter of semicircular disc = half of the circular disc

perimeter of disc = 2*pie*radius

perimeter of semi circular circle = 2*pie*r/2

=pie*r

22*30.8/2= 193.6