Question

triangle abc is an isosceles triangle with ab=ac and Angle B e equals to four angle A what is the measure of angle A​

Answer 1

Answer:

B = C = 40°

Step-by-step explanation:

We have ,

AB = AC

→ B = C

In ∆ABC, we have

→ A + B + C = 180°

→ A + B + B = 180°

→ 100° + 2 B = 180°

→ 2 B = 80°

→ B = 40°

Hence, B = C = 40°

Answer 2

Answer:

B = C = 40°

Step-by-step explanation:

We have ,

AB = AC  

→ B = C  

In ∆ABC, we have  

→ A + B + C = 180°

→ A + B + B = 180°  

→ 100° + 2 B = 180°  

→ 2 B = 80°  

→ B = 40°  

Hence, B = C = 40°

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