find x. (∆OAB=40°.
plz help me
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Answer:
OAB=ABO(because both angled on same segment of circle )....1
so
in ∆OAB
AOB+OAB+ABO=180(sum of all angles of triangle)
AOB+OAB+OAB=180(OAB=ABO)
AOB+2OAB=180
40+2OAB=180
2OAB=180-40
OAB=140/2
OAB=70
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