Question

triangle ABC is Tsosceles with AB=BC. If LB =50degree , find the base angles LA and LC. 3​

Answer 1

Answer:

80,100

Step-by-step explanation:

△ABC is an isosceles triangle.

 ∴∠B=∠C=50o

∠BAC=180−50−50=80o

∠BAC=∠BDC=80o (angles on circle by the same chord on the same segment are equal)

∠BEC is supplementary angle of ∠BAC

∴∠BEC=180−∠BAC=180−80=100o