Question

Tony makes a triangle using three sticks of length 20 inches, 21 inches and 28 inches. The triangle Tony makes is a right triangle. True or False?

Answer 1

In a right triangle the square of the longest side is equal to the sum of the squares of the shorter sides.


`20^2+21^2=28^2 \\ 400+441=784 \\ 841 =784 \\ false`

The answer is 'false'. The triangle isn't a right triangle.