Question

A rectangular book measures 18 x 9. What is the length of its diagonal? Round your answer to the nearest tenth

Answer 1

20.1246118 or 20.12

Explanation:

First draw the box with the diagonal, as you can see it is split into 2 equal right triangles. Now use the pythagorean theorem (a^2+b^2=c^2) to find the length of the diagonal