The equation of a circle is (x - h)² + (y - k)² = radius² where (h, k) is the center.
If the diameter is 16, then the radius is 8.
Your equation is:
(x - 7)² + (y + 5)² = 64
Answer: 72
We can use ratios
117 inches / 13 inches = 9
The corn cast shadow is 9 times bigger than the example we are given.
9 * 8 = <u><em>72</em></u>
What do you need to help?
The answer is an equilateral triangle
