SOLUTION: What is the area of a 30-60-90 triangle if the middle side is equal to 9?

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Question 978203: What is the area of a 30-60-90 triangle if the middle side is equal to 9?
Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
30-60-90 triangles are
1-sqrt3-2 in size.
If the middle side is 9, the other leg is 9/sqrt(3) =9 *sqrt (3)/3= 3 (sqrt 3)
The area is 1/2 bh=(1/2)*9*3 sqrt(3)=(27/2)sqrt (3)=23.4 sq units