Question

what is answer this triangle​

Answer 1

let the angle a and c=x°

angle a+angle b+angle c=180°

x+100+x=180

2x+100=180

2x=180-100

2x=80

x=80/2=40

angle a and angle c=40°

Answer 2

Answer:

40

Step-by-step explanation:

By angle sum property

x+x+100=180

2x+100=180

2x=180-100

2x=80

x=80/2

x=40