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?

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asked Dec 20, 2016 83.0k views

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Brian Montgomery · Answer 1 · 2016-12-26T03:52:53+0000

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.

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?

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