SOLUTION: Find the length of the hypotenuse of a right angled triangle , if the other 2 sides measure 9cm and 12cm.

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Question 892731: Find the length of the hypotenuse of a right angled triangle , if the other 2 sides measure 9cm and 12cm.
Found 2 solutions by Fombitz, richwmiller:
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Use the Pythagorean theorem,
H%5E2=9%5E2%2B12%5E2
H%5E2=81%2B144
Add it up and take the square root.

Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
This is when knowing about right triangles pays off.
You should know that 3,4,5 and 5,12,13 are integer sides of a right triangle.
All multiples are also right triangles.
9=3*3
12=3*4
so the hypotenuse would be 3*5=15