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a) Using Pythagoras theorem,
(20) ²=(16) ²+(12) ²
400=256-14
400≠242
these triplets will nor make a right angle.
b)
( hypotenuse) ²=(side 1) ²+(side 2) ²
=(12) ²+(9) ²
=144+81
(hypotenuse) ²= 225
hypotenuse=√225
hypotenuse=15
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