find the value of abc if pq//rs
∠QPT+∠PTU=180 o
(PQ∥TU, co-int ∠s).
and ∠UTR+∠TRS=180 o
(TU∥RS, co-int, ∠s)..
Adding (i) and (ii) we get ∠QPT+∠PTU+∠UTR+∠TRS=180 o
+180 o
=360 o
a+∠PTR+c=360 o
⇒ a+b+c=360 o
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find the value of abc if pq//rs
∠QPT+∠PTU=180 o
(PQ∥TU, co-int ∠s).
and ∠UTR+∠TRS=180 o
(TU∥RS, co-int, ∠s)..
Adding (i) and (ii) we get ∠QPT+∠PTU+∠UTR+∠TRS=180 o
+180 o
=360 o
a+∠PTR+c=360 o
⇒ a+b+c=360 o