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Step-by-step explanation:
straight line makes angle 180 degrees so angle PQR is 40 degrees
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Step-by-step explanation:
- Procedure 1
140 +/_ PQR= 180° ( linear equation)
/_PQR=180°-140°
= 40°
- Procedure 2
sum of interior Angles = opposite exterior angle
/_PRQ +/_ RPQ= 140° (EQ. I)
/_PQR+/_RPQ+/_PRQ = 180 (angle sum property of a ∆)
/_ PQR + 140 ( as per EQ. I ) =180 °
/_PQR= 180 -140
= 40°
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