Answer:
70 degrees for both the unknown angles
Step-by-step explanation:
All angles in a triangle measures 180
So since congruent sides make congruent angles we can say that there will be two identical angles
Lets take the unknown angle as "x"
Since there are two unknown angles x becomes 2x
So
40+2x=180
Subtract 40 from both sides
2x=140
Divide by 2 on both sides
X=70
