The length of unknown third side of right triangle can be found by using Pythagoras theorem. a = √(c^2 - b^2) is the formula to find the length a:, b = √(c^2 - a^2) is the formula to find the length b: and c = √(a^2 + b^2) is the formula to find the length c:.
It looks like you have a right-angled triangle with hypotenuse of 12 and a base of 10 <span>h^2 + 10^2 = 12^2 </span> <span>h^2 + 100 = 144 </span> <span>h^2 = 44 </span> <span>h = √44 = appr 6.6</span>