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

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

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

Step-by-step explanation:

not only in mathematics, scientific proof also are required in the other field of science. also maths proofs are of particular structure, containing steps and logics. so proving is like doing science, it is science. that's why it is important to prove. 

an inaccurate proof leads to errors, or stating results that are not accurate.  which wil mess the probelm up you dont want this