Question

What is the perimeter of a semi- circle whose radius 21 cm? Use π 22/7

Answer 1

Answer:

7cm....................

Answer 2

Answer:

So here , The formula to find the Perimeter of a Semi Circle is 2πr .

                                   ( Where " r " is the radius of the Semi-Circle )

Now here , r = 21 cm

Now , 2πr = 2 × 22/7 × 21     ( π = 22/7 )

                 =  44/7 × 21

                 = 132 cm

∴ The Perimeter of the Semi Circle is 132 cm whose radius is 21 cm .

The BadSoorat here ✌