ACT 2010 December(69A) Math Question 18 Explanation - ACT Helper

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2010 December(69A) Math Question 18
Angles
- Collinear Points & Triangles
Choice G
$∠ A D B = 180 ° - 30 ° - 20 ° = 130 °$ $∠ E D A = 180 ° - 130 ° = 50 °$ $∠ E A D = 180 ° - 83 ° - 50 ° = 47 °$
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