Question

Please help I don’t have a lot of time

Answer 1

cosA=AC/AB=6/17

m∠A= cos(6/17)≈69.33268..=69,3°

m∠B= 180-90-69.3=20.7°

cosA=6:17 = AC/AB

→AC=6

→AB=17

→BC=15.9

BC²=17²-6²

BC=√253≈15.9