Answer:
∠a = 73
Step-by-step explanation:
∠b = 34
∠a =?
∠a = ∠c
to find ∠a we need to take ∠c and ∠a let x
sum of interior angles of traingle = 180
∠b + ∠a + ∠c = 180
34 + x + x = 180
34 + 2x = 180
2x = 180 - 34
2x = 146
x = 146 ÷ 2
x = 73
C
Step-by-step explanation: look in the comments
