Question

In ∆ABC, ∠ABC = 900

, AB = BC,​

Answer 1

Answer:

BC=AB

⇒∠A=∠C (As angles opposite to equal side are equal)

let thte angles be x each.

Now by angle sum property

∠A+∠B+∠C=180

∘

⇒x+80

∘

+x=180

∘

⇒2x=180

∘

−80

∘

⇒2x=100

∘

⇒x=50

∘

∴∠A=50

∘

Answer 2

Answer:

45,45

Step-by-step explanation:

|A = |C=x

A+B+C

=180

90 + x+x=180

2x =180-90

x=90/2

x=45