Question

find the perimeter if the following figure​

Answer 1

Step-by-step explanation:

Given that

Radius=r=7cm

=> Perimeter of whole Circle= 2πr=2π7=14π

To Find Unknown Curve Length

Angle=90°=½ π

r=7 cm

Angle=curve length/radius

=> Curve length=Angle×Radius=½ π×7=7π/2

=3.5π

Now

Perimeter of Given Curve

=Perimeter of whole Circle- Perimeter of Unknown Curve

=14 π-3.5 π = 10.5 π

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