Answer:
Step-by-step explanation:
4) 64° + 83° + ∠ACB = 180° ( angle sum property of triangle)
147° + ∠ACB = 180°
∠ACB = 180° -147°
∠ACB = 33°
5) 101° + 40° + ∠EFD = 180° ( angle sum property of triangle)
141° + ∠EFD = 180°
∠EFD = 180° -141°
∠EFD = 39°
