Question

Find perimeter of a semicircle that has radius of 6cm (give answer in 2 d.p)​

Answer 1

30.85 cm to 2 d.p.

Explanation:

The perimeter is made up of the diameter ( = 2*radius) and half a full circle

= 6*2 + 1/2 * π* 6

= 12 + 3π

= 30.849

Answer 2

30.84 cm

Explanation:

Formula for perimeter of semi-circle = πr + 2r

Radius (r) = 6 cm

π = 3.14

Perimeter

= πr + 2r

= 3.14(6) + 2(6)

= 3.14(6) + 12

= 18.84 + 12

= 30.84 cm

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Hope it helps ⚜