Question

Total perimeter of a semi-circle of radius 6 cm is​

Answer 1

Answer:

3π+6 cms

Explanation:

The length of the curved part is half the circumference of the circle. So in this case that is 3π cm as the circumference is 2πr where r is the radius. The length of the straight part is just the diameter of the circle or 2 x radius which is 6 cm in this case. So the total perimeter of the semicircle is 3π+6 cms.

Answer 2

The answer is 30.85

GIVEN

Radius of the semi-circle = 6 cm

TO FIND

Perimeter

SOLUTION

The above problem can be simply solved as follows;

Perimeter of a semicircle = πr + 2r

Where,

r = radius

Putting the values

Perimeter = (22/7) × 6 + 2 × 6

= (132/7) + 12

= 18.85 + 12

= 30.85

Hence, The answer is 30.85

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