Question 303747: how can you tell that a triangle with side lengths of 9,12 and 15 is a right triangle Found 2 solutions by jim_thompson5910, mzyuhnique:Answer by jim_thompson5910(35256) (Show Source):
You can put this solution on YOUR website! If you use the Pythagrean therom a^2+b^2=c^2 you c is your hypotenuse your a is your base and you b is your leg. a nd b's sqaures add up to equal c's square it is a right triangle! (:
9^2+12^2=15^2
81+144=225
225=225.
or you could use the famous right triangle method 3,4,and 5.
3*3=9
4*3=12
5*3=15.
in this method u see if the same thing is multiplied by 3,4,5. ifit is then its a right triangle
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