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Answer 1

Qno.3: sol)Angle ACD = 120 °

Qno.8: sol). The angles will be 30°, 60° and 90° respectively.

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Answer 2

3. angle ACD measures (70+50) = 120°

5. Angle Sum Property
90 + 60 + x = 180°
150 + x = 180°
180° - 150 = 30

7. 60 + 1x + 2x = 180
3x = 120
120 / 3 = 40

1x = 40 × 1 = 40
2x = 40 × 2 = 80

8.1x + 2x + 3x = 180
5x = 180
180/5 = 36

1x = 36
2x = 72 (36×2)
3x = 108(36×3)