In a 45-45-90 right triangle, if each leg has length 5, the hypotenuse has length:
A5
B5√2
C10
D10√2
Answer & Solution
Correct answer: B. 5√2
In a 45-45-90 triangle, hypotenuse = leg × √2. So hypotenuse = 5√2. (This is a key right-triangle ratio: 1:1:√2.)
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