So in order to find line AC you must find line AD and DC then plus them together.
to find AD use Pythagoras theorem a^2 = c^2 - b^2 AD^2 = 7.5^2 - 6.5^2 AD^2 = 56.25 - 42.25 AD^2 = 14 square root both sides to get rid of the ^2 AD ≈ 3.7 or 3.74
Do the same for DC DC^2 = 10^2 - 6.5^2 DC^2 = 100 - 42.25 DC^2 = 57.75 DC ≈ 7.6
