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What is the length of the altitude of the equilateral triangle below?30°613613a60" 90" 60"313 313O A. 3O B. 9O D. 3N3o E. 108o F. 81

What is the length of the altitude of the equilateral triangle below30613613a60 90 60313 313O A 3O B 9O D 3N3o E 108o F 81 class=

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fzhran
The answer is B. 9
Use cosine rule. In this case, I am using SOH and the right triangle:
sin 60°= a ÷ 6 root 3
(6 root 3)(sin 60°)= a
a=9
ianbagherzadeh

Answer:

B)9

Step-by-step explanation:

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