Question

find the perimeter of a semi circle whose radius is R​

Answer 1

Answer:

The total perimeter of a semi circle is πr+2r=r(π+2)

The perimeter of a semicircle is the sum of the half of the circumference of the circle and diameter. As the perimeter of a circle is 2πr or πd. So, the perimeter of a semicircle is 1/2 (πd) + d or πr + 2r, where r is the radius

Answer 2

Answer:

The answer is R(⊼+2)

Step-by-step explanation:

Given radius is r, let P be the perimeter

Then,

P=⊼R+d

P=⊼R+2R

P=R(⊼+2)

so the perimeter would be R(⊼+2)

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