Answer:
220-16x
Step-by-step explanation:
Given: A triangle ABC
Angle 1 is 8x-20
AB=BC
We must find Angle B.
Since we have two congruent sides, we also have two congruent angles.
Thise angles will be 1 and 2 since they are opposite of the congruent sides.
This means
Angle 1 and 2 measure 8x-20
All traiangles add up to 180 so we have
[tex](8x - 20) + (8x - 20) + y = 180[/tex]
[tex]16x - 40 + y = 180[/tex]
[tex]y = 220 - 16x[/tex]
So the measure of Angle B is 220-16x.
