Question

In a AABC, AB = BC and angle B=82º. Find the angle A​

Answer 1

Answer:

From fig.,

In △ABC,

∵AB=BC

∴∠C=∠A=(2x−20)°(∵ angle oppsite to the equal sides are equal)

∠B=x°

As we know that sum of all interior angles of a triangle is 180°.

∴∠A+∠B+∠C=180°

⇒(2x−20)°+x°+(2x−20)°=180°

⇒(5x−40)°=180°

⇒5x=180°+40°

⇒x=

5

220

=44°

∴∠B=44°

Hence, the correct answer is 44

Answer 2

Answer:

Hi friend ,

see the pic that i have attached to know your answer.

Hope it help u..