ACT 2019 June(B02) Math Question 3 Explanation - ACT Helper

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2019 June(B02) Math Question 3
Angles
- Collinear Points & Triangles
Choice E
$∠ A C B = 180 ° - ∠ A B C - ∠ B A C = 180 ° - 108 ° - 42 ° = 30 °$ $∠ A C D = 180 ° - ∠ A C B = 180 ° - 30 ° = 150 °$
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