Question

A right triangle has one side of length 7 and a hypotenuse of length 10. How long is the third side of the triangle?

Answer 1

Use Pythagorean.

\(\Large \color{Black}{\Rightarrow 7^2 + x^2 = 10^2 }\)
\(\Large \color{Black}{\Rightarrow 49 + x^2 = 100 }\)
\(\Large \color{Black}{\Rightarrow x^2 = 51 }\)
\(\Large \color{Black}{\Rightarrow x = \sqrt{51} }\)