alleryIn a 30-60-90 right triangle, the side opposite the 30° angle has length 5. The side opposite the 60° angle has length:
A$10$
B$5\sqrt{3}$
C$5\sqrt{2}$
D$2.5$
Answer & Solution
Correct answer: B. $5\sqrt{3}$
In a 30-60-90 triangle, sides oppose 30°, 60°, 90° in ratio 1 : √3 : 2. If the side opposite 30° is 5, the side opposite 60° is 5√3.
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