Question

In ∆ ABC,if AB=AC and B=70° Then angle A is equal to। { 1} 70° , (2) 40°, (3) 65°,(4) 20°​

Answer 1

Step-by-step explanation:

Since, AB = AC, therefore, ∠B=∠C

By angle sum property of triangle,

∠A+∠B+∠C=180

o

70

o

+2∠B=180

o

2∠B=110

o

∠B=55

o

Hence, ∠B=∠C=55

o

Answer 2

Answer:

2) 40°

Step-by-step explanation:

If AB=AC

Then both

B) and C) = 70°

70°+ 70° = 140°

Triangle

180° - 140°

Answer - [40°]

Hope it will help you