Why is it not possible to make a right triangle using lengths of the12 feet, 30 feet, and 45 feet

Answer: the sum of the two smaller sides are not larger then the 3rd side

The longest side of a right triangle is the hypotenuse.

The hypotenuse of a right triangle needs to equal the square root of the sum of the two sides Squared of the triangle. This is Known as the Pythagorean theorem.

Hypotenuse = sqrt (12^2 + 30^2)

= sqrt (144 + 900)

= sqrt (1044)

=32.31

45 is greater than 32.31