Question

IS ABC ISOSCELES? GIVE REASONS FOR YOUR ANSWER

Answer 1

yes because A is 80,b and c are 50

Answer 2

Heya!

Here is yr answer.....

Given,

Δ ABC

In which, B = 50° and exterior angle ACD = 130°

Now,

A+B = 130° (Sum of two interior = exterior angle)

A+50 = 130°

A = 130-50

A = 80°

And,

A+B+C = 180°

80+50+C = 180

130+C = 180

C = 180-130

C = 50


Here, B = C

Also, AB = AC (Sides opp. to equal angles)


Therefore, ΔABC is isosceles




Hope it hlpz..