Question

ABC,if LA=LB=40°then LC is ____.​

Answer 1

Answer:

In a △ABC, by angle sum property, sum of angles of a triangle is 180°

 

∴∠ABC+∠BCA+∠CAB= 180°

 

Given : ∠A=∠CAB= 55°

and ∠B=∠ABC= 40°

∴55° +40° +∠BCA= 180°

∴∠BCA= 180 °−95° = 85°  .

Therefore, ∠BCA= ∠C= 85°

Hope it helps you!! ( You haven't mentioned what is LA but i think this is your answer)