Question

urgent ans..plz it isurgent


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Answer 1

Answer:

simple ans dear

<prs = <qrt= 100°

<prq = 180 - <prs. ( linear pair)

<prq = 180- 100

= 80

now, in triangle prq

<qpr = 180- ( <pqr + <prq)

<qpr = 180- (80 +40)

<qpr = 180- 120

= 60

and,

<prq = <srt = 80°. ( vertically opposite angles)

in triangle srt,

<rts = 180-(<srt + <rst)

<rts= 180- 150

= 30°

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