Yes.
3, 4, 5 is a right triangle and by Pythagora's proof 32 + 42 = 52
Your 9, 12, 15 triangle has the same proportions scaled up 3 times.
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If the legs of a right triangle have measures of 9 and 12, the hypotenuse is: 15
Using Pythagoras' theorem it works out as 15 inches
a squared + b squared = c squareda squared + 12 squared = 15 squareda = square root(225 - 144)a = square root(81)a = 9
is it a right triangle if the measure is 5 7 and 9
A triangle with sides measuring ; 4 feet , 6 feet and 9 feet is a right triangle. A triangle is a right triangle as long as it has one 90 degree point.