Answer:
The following triangle is equilateral triangle. Solve for the
unknown variable. y=17 is the answer
The distributive property of 18(12), or simply 18 * 12, is 216. (This is your answer.)
The formula for the circumference is 2πr.
The diameter d is given, which is 2 times the radius r (d = 2r)
So you have to calculate π d = 3.142×1.8 ≈ 5.7
The answer is 5/9. I showed a bit more work on the other post
All you do is add up all of the side lengths, and you got the perimeter.
