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The hypotenuse of a right triangle is 12cm and one leg is 9cm. how long is the other leg?
Wiki User
∙ 12y ago
The Pythagorean Theorem states that in a right triangle, a2+b2=c2, where a and b are the legs, and c is the hypotenuse.
Since you only know the hypotenuse and a leg, put the unknown side by itself, and the other two on the other side of the equal sign.
a2=c2-b2
Now plug in the numbers you know (c and b)
a2=122-92
a2=144-81
a2=63
Now take the square root of each side.
a=√(63)
Wiki User
∙ 12y ago
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