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Sagot :
Answer:
15.......................
- Consecutive interior angles
16........................
- Corresponding angles
17........................
- Alternate interior angles
18........................
- Vertical angles
19........................
- m∠2 + m∠3 = 180
- 8x - 20 + 5x + 5 = 180 ⇒ 13x = 195 ⇒ x = 15
- m∠2 = 8*15 - 20 = 100°
- m∠3 = 5*15 + 5 = 80°
20........................
- m∠1 = m∠7 = m∠3 = m∠5 = 80°
- m∠2 = m∠8 = m∠4 = m∠6 = 100°
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