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How do you do number 2 pls help

How do you do number 2 pls help-example-1
User Gigaxel
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1 Answer

2 votes

Answer:

See picture.

Explanation:

First, I would start by drawing the triangle. We know it is a right triangle, so start with that. I then set the given angle (30 degrees) to be the top angle. Then, I drew the right angle. I then used the acronym "SOH CAH TOA" to find out what equation I needed to use. We were given the adjacent side, so I decided to use cosine. The equation for cosine is adjacent/hypotenuse. I setup my equation
cos(30)=(15)/(b). Then, I solved the equation for b. To find the last side, I used Pythagorean's theorem
a^(2) + b^(2) = c^(2) to find side C. To find the missing angle, I added 90 (the right angle) to 30 (the top angle) and got 120. I then subtracted 120 from 180 because the all the angles added together in a triangle must equal 180.

How do you do number 2 pls help-example-1
User Desco
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7.9k points