SOLUTION: The area of an equilateral triangle is 125 sq. cm. Find its altitude? i need help coz i dont know how to answer it. my teacher didnt discuss this part :(

Question 927131: The area of an equilateral triangle is 125 sq. cm. Find its altitude?
i need help coz i dont know how to answer it. my teacher didnt discuss this part :(

Answer by ewatrrr(24785) (Show Source): You can put this solution on YOUR website!

.
The area of an equilateral triangle is 125 sq. cm.
Find its altitude:
I. Altitude bisects Base
II. 30-60-90 Triangle is formed: Ratio of Sides: 1 : √3 : 2
III. 30-60-90 Triangle formed: sides: s/2, (s/2)√3, s
........
A =
A =
A = (1/4)s^2 √3 = 125
s = = 17 rounded
h = = 8.5√3 = 14.7 rounded
and...checking
A = = 125 rounded
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