Question

Find the measure of angle A

Drawing to come.

Answer 1

under 90

Answer 2

over 35

Answer 3

I know I should use cosine. So don't I just do cosine90 x something?

Answer 4

So with how that drawing looks, C must be 90. So now, let's try to find B. sin(B) = 5/21, sin(B) = 0.2381, \[\sin^{-1} (0.2381) = 13.77 \deg\].

Answer 5

Now that's your angle B. Add B and C together, then do 180 - (B+C). That will be your angle A.

Answer 6

76

Answer 7

76.23, but yes. Try to be as accurate as possible with these problems.

Answer 8

Do you have time another one?

Answer 9

Sure.

Answer 10

Find the measure of angle B.