Question

In triangle ABC AB=BC=AC.What is the measurment of angle A

Answer 1

Step-by-step explanation:CA

Sum of all angles of a triangle=180 degree

Angles are A, B, C

A+B+c=180

A+(A+20)+(A+B)=180

A+(A+20)+(A+A+20)=180

4A+40=180

4A=140

A=35

Now B=A+20

B=35+20

B=55

C=A+B

C=35+55

C=90

Hence, angles are 35, 55, 90 degrees Ans