2 answers:
Answer:
100
Step-by-step explanation:
All angles in a triangle equal to 180.
80+20=100
180-100=80
The line is 180
180-80=100
Answer:
100°
Step-by-step explanation:
see attached as reference.
the exterior angle ∠CAD is the sum of its two remote interior angles ∠ACB and ∠CBA
∠CAD = 80 + 20 = 100°
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