Question

Using the Pythagorean Theorem, could 20, 6 and 21 be the measures of the sides of a right triangle? Assume that the largest is the hypotenuse.

Answer 1

No, it cannot be the sides of a triangle

because,

$21 ^{2} = 441$

$20 {}^{2} + 6 {}^{2} = 400 + 36 = 436$

436 is not equal to 441

Answer 2

No it cannot be.

Since,

21^2=441

And now,

20^2+6^2

=400+36

=436

Therefore 436 is not equal to 441