Question

 If ∆ABC is a right angled triangle and angle B=90°, angle A=30°, angle C=60° and AC=20, Find the length of side AB.​

Answer 1

Answer:

here in triangle ABC

B = 90° , A = 30°

A + B + C = 180°

30 + 90 + C = 180°

C = 180 - 120

C = 60°

by 30°-60°-90°

BC= 1/2× AC ---(side opposite to 30°)

BC = 1/2×20

BC = 10 cm

AB =underoot 3/2×AC ----(side opposite to 60°)

AB = underoot 3/2×20

AB = 10 underoot 3

Step-by-step explanation: