4) In A POR, If m2 P and 2 Q are equal mZ PRQ = 80° Then find the measures of i) Z PRT ii) m2 iii) m ZP (Solve with reasons.) 800 Q R T
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Answer:
Given, PQ⊥PS,PQ∥SR,∠SQR=28
∘
,∠QRT=65
∘
According to the question,
x+∠SQR=∠QRT (Alternate angles as QR is transversal.)
⇒x+28
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=65
∘
⇒x=37
∘
Also ∠QSR=x
⇒∠QSR=37
∘
Also ∠QRS+∠QRT=180
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(Linear pair)
⇒∠QRS+65
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=180
∘
⇒∠QRS=115
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Now, ∠P+∠Q+∠R+∠S=360
∘
(Sum of the angles in a quadrilateral.)
⇒90
∘
+65
∘
+115
∘
+∠S=360
∘
⇒270
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+y+∠QSR=360
∘
⇒270
∘
+y+37
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=360
∘
⇒307
∘
+y=360
∘
⇒y=53
∘
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