Find the perimeter of the figures below

Hello, hope your having a nice day, here is the answer

Step-by-step explanation:

Perimeter of Triangle : 6+6+6 =18 (I got the other 6 from 3+3)

Perimeter (Circumference) of semi Circle : P=2*pi*r  <-- this is the formula for the half circle

P=2*pi*3 = 6pi = 18.8 now this is the perimeter of the whole circle. If we want to find half of that circle, this would be 9.4.

9.4+18 = 27.4

i think it is everything has to equal 180 so, if i correct 4=c. 6=d. 8=a. 7=b. and the last question would be c. because they are parallel lines and they are congruent.

step-by-step explanation:

the reason everything has to equal to 180 is because that is how it works. i'm guessing that is its rule. 4 and 8 are congruent and parallel so, that would be 30+30 because they have the same number. it would equal 60. 6 and 7 are congruent and parallel so, that would be 30+30 because they have the same number. it would equal 60. 60+60 is 180. so, now you have your answer

your answer is  

a.

5

step-by-step explanation: