Question

Solve the triangle. A = 21°, C = 105°, c = 5

Answer 1

B = 54°; a ≈ 1.86; b ≈ 4.19

Explanation:

The remaining angle is ...

B = 180° -105° -21° = 54°

The law of sines tells you the side lengths are in proportion to the sines of the angles:

a = 5·sin(A)/sin(C) ≈ 1.86

b = 5·sin(B)/sin(C) ≈ 4.19