In Fig. 6.39, sides QP and RQ of ∆PQR are produced to points S and T respectively,
If Angle SPR= 135° and
Angle PQT= 110° ,
Find Angle PRQ
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★ Given :-
<SPR = 135°
<PQT = 110°
★ prove :-
< PRQ
★ Proof :-
180 - 135 = 45
180 - 110 = 70
<p + <Q + <R = 180
★ Angle Sum property :-
45 + 70 + <R = 180
115 + <R = 180
<R = 180 - 115
<R = 65
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