You can solve this question with pythagorean theorem >

Based on the information, you already have one side (a or b, doesn't matter, 12) and the hypotenuse (the cut, c, 15)
So:
1.

2. 144+

= 225
3.

= 225 - 144 = 81
4.

5.
Then y = -84
Hope I helped!
Answer:
circumference = diameter * PI which is 3.14159 ...
circumference = 72 * 3.14159 ...
circumference = 226.19467 inches
Step-by-step explanation:
There are 6 miles in 31,680 feet