1.

Find the value of the unknown in each of the following figures.​

Answer»

Answer:

(C) 3c° + 4c° + 40° = 180°

7c° = 140°

c° = 20°

So angle CAB = 3(20) = 60°

Angle BAC = 4(20) = 80°

(d) d° + 4d° + 3d° = 180°

8d° = 180°

d° = 22.5°

Angle ACB = 22.5°

Angle CAB = 3(22.5) = 67.5°

Angle CBA = 4(22.5) = 90°


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