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Sagot :
Answer:
Properties of a parallelogram
- Opposite sides and opposite angles are congruent
- Adjacent angles are supplementary (sum to 180°)
- Diagonals bisect each other
#1
- 17 = x + 3 ⇒ x = 17 - 3 ⇒ x = 14
- y - 2 = 38 ⇒ y = 38 + 2 ⇒ y = 40
#2
- a + 5 = 15 ⇒ a = 15 - 5 ⇒ a = 10
- 3b = 111° ⇒ b = 111°/3 ⇒ b = 37°
#3
- 2u = 124° ⇒ u = 124°/2 ⇒ u = 62°
- 124° + v - 3 = 180° ⇒ v + 121° = 180 ⇒ v = 180° - 121° ⇒ v = 59°
#4
- t + 5 = 19 ⇒ t = 19 - 5 ⇒ t = 14
- 3s = 27 ⇒ s = 27/3 ⇒ s = 9
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