In the figure, line AB ll line CD and line XY is their transversal. If ∠PQC = 75⁰, then find the measure of ∠XPB.
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Answer:
(i) Since AB is a straight line and ray RT stands on it, then
∠ART+∠BRT=180
∘
(Angles in a linear pair)
⇒∠ART+105
∘
=180
∘
⇒∠ART=180
∘
−105
∘
=75
∘
(ii) Since line AB ∥ line CD and line PQ is a transversal intersecting them at R and T, then
∠ART=∠CTQ (corresponding angles)
⇒75
∘
=∠CTQ
⇒∠CTQ=75
∘
(iii) Since line AB ∥ line CD and line PQ is a transversal intersecting them at R and T, then
∠BRT=∠DTQ (corresponding angles)
⇒105
∘
=∠DTQ
⇒DTQ=105
∘
(iv) Since line AB and line PQ intersect at point R, then
∠PRB=∠ART (vertically opposite angles)
⇒∠PRB=75
∘
(∵∠ART=75
∘
)
Answered by
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Answer:
line AB ll line CD and line XY is their transversal. If ∠PQC = 75⁰, then find the measure of ∠XPB.
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