Question

Solve triangle ABC if C = 90 degrees
A = 7, c = 9, B = 40 degrees

Answer 1

what to find?

Answer 2

well you know A = 50 because they have to add up to 180

Answer 3

a = 50 b = 40 c = 90

Answer 4

and sin40 = b/9
so b=5.7

Answer 5

i assume you mean little a (the side) is 7, not the measure of the angle

Answer 6

since this is a right triangle you can find the measure of the other side using pythagoras. i think this question is not right however

Answer 7

third side should be
\[\sqrt{9^2-7^2}=\sqrt{32}=4\sqrt{2}\]