Answer:
B Angle C = 73 degrees
Explanation:
We know B = C so call it x
A = 34
The three angles of a triangle add to 180 degrees
A + B+ C = 180
34 + x+ x = 180
Combine like terms
34+2x = 180
Subtract 34 from each side
34-34 +2x = 180-34
2x = 146
Divide by 2
2x/2 = 146/2
x = 73
Angle C = 73 degrees