Question

Dylan has a square piece of metal that measures 10 inches on each side. He cuts the metal along the diagonal, forming two right triangles. What is the length of the hypotenuse of each right triangle to the nearest tenth of an inch?

Answer 1

use Pythagoras theorem,
c² =a² +b² 
x² =10² +10² 
x² =100+100
x² =200
x=14.14
x=14.1