SOLUTION: The hypotenuse of a right triangle is 13cm. One of the legs is 7cm longer than the other leg. Find the area of the Triangle (Please explain how you got your answer)

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Question 971099: The hypotenuse of a right triangle is 13cm. One of the legs is 7cm longer than the other leg. Find the area of the Triangle (Please explain how you got your answer)
Answer by reviewermath(1029) About Me  (Show Source):
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The hypotenuse of a right triangle is 13cm. One of the legs is 7cm longer than the other leg. Find the area of the Triangle (Please explain how you got your answer)
Solution:
Let x = shorter leg
Therefore, x + 7 = larger leg
Using Pythagorean Theorem:
x%5E2+%2B+%28x%2B7%29%5E2+=+13%5E2
x%5E2+%2B+%28x%5E2+%2B+14x+%2B+49%29+=+169
2x%5E2+%2B+14x+-+120+=+0
Divide both sides by 2
x%5E2+%2B+7x+-+60+=+0
(x - 5)(x + 12) = 0
x - 5 = 0 or x + 12 = 0
x = 5 [Disregard the negative root]
The larger leg is equal to x + 7 = 12
The area is equal to (1/2)(5)(12) = 30
Answer: 30 cm%5E2