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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
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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 below?30°613613a60&quot-example-1
User Ben Fischer
by
8.1k points

2 Answers

6 votes

Answer:

B)9

Explanation:

APEX ANSWER

User Mike Thomsen
by
8.0k points
3 votes
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
User Ligeia
by
7.9k points
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