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In Fig. 6.39, sides QP and RQ of DeltaP ...

In Fig. 6.39, sides QP and RQ of `DeltaP Q R` are produced to point S and T respectively. If `/_S P R=135^@` and `/_P Q T=110^@`, find `/_P R Q.`

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`∠PQT+∠PQR=180 ^ ∘` (Straight angle made on line TR at point Q)
`110 ^ ∘ +∠PQR=180 ^ ∘`
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