Bunuel wrote:
If the area of the triangle in the figure above is 100, what is the length of side AB?
(A) 10√3
(B) 10√5
(C) 20
(D) 24
(E) 25
[Reveal] Spoiler:
100=(1/2)*20*x
x=10
AB is the hypotenuse, therefore
20^2+10^2=(AB)^2
AB^2=500
AB=10√5
Answer: B
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