The corner of a room where two walls meet the floor should be a right triangle. Jeff makes a mark along each wall. One mark is 15 inches from the corner. The other is 8 inches from the corner. How can Jeff use the Pythagorean Theorem to see if the walls form a right​ angle?
If the distance across the floor from one mark to the other is
nothing ​inch(es), then the
Pythagorean Theorem
says that because 15 squared plus 8 squared equals nothing squared
​, a right triangle is formed.