Math, asked by abhinaba20, 6 months ago

4. Find the perimeter of a semicircular disc of diameter 30.8 cm.
(Hint: Perimeter of a semicircle = (nt + 2)r.]​

Answers

Answered by adityatripathy123
0
We know that d=2r
So,30.8=2r
R=15.4
Perimeter of a semi-circle=2.pi.r/2
So pi.15.4=22/7 into 15.4
That is the length of the curved line
Add that to 30.2(diameter) and you get the perimeter of the disc
DO YOUR CALCULATIONS ON YOUR OWN
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