Question

Does 10, 9, and 15 make a right triangle?

Answer 1

the triangle formed by sides 10, 9 and 15 units can't be a right angled triangle, because they doesn't form the pythagorean triplet, that is the sum of squares of the smaller sides isn't equal to the square of largest side,

sum of squares of smaller sides

=》

$10 {}^{2} + 9 {}^{2}$

=》

$100 + 81$

=》

$181$

now, square of largest side (hypotenuse)

=》

${15}^{2}$

=》

$225$

they aren't equal, proved