Solve the triangle using the Law of Sines. (Assume b and c = 20, and ∠C = 65°. Round the length to two decimal places.)

Question

a =
∠A =	°
∠B =	°

Answer 1

Since b = c, ∠B = ∠C = 65°. So, ∠A = 180° - ∠B - ∠C = 50°.

Using the Law of Sines, sin50° / a = sin65° / 20

So, a(sin65°) = 20sin50°

Therefore, a = 16.90

Answer 2

m∠B = 65º by Isosceles triangles

m∠A = 50º by sum of angles

a / sin 50° = 20 / sin 65°

Can you solve for a and anwer?