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what is the best approximation for the perimeter of a semicircle with a diameter of 12 cm? use 3.14 to approximate pi.

Answer with Step-by-step explanation:

The perimeter(P) of a semi circle is given by:

P=πr+2r

where r is the radius of the semicircle

r=d/2 where d is the diameter

We are given diameter=12 cm

⇒ Radius= 12/2

               = 6 cm

Perimeter=3.14×6+2×6

               =18.84+12

              =30.84 cm

Hence, best approximation for the perimeter of a semicircle with a diameter of 12 cm is:

30.84 cm

dc=6 square root of 3 and ac is 12 square root 3

c and d

step-by-step explanation:

square root of 3/2 = 18/c

cross multiply to get 18*2=√3*c

36/√3 * √3/√3 = c

c= 36*√3/3

c=12√3

d is the answer

step-by-step explanation: