Q24 of 153 Page 148

In the given figure, AB || CD. If ∠CAB = 80° and ∠EFC = 25°, then ∠CEF = ?

AB || CD

BAC = DCF = 80^o

ECF + DCF = 180^o (linear pair of angles)

ECF =100^o

Now in triangle CFE,

ECF + EFC + CEF = 180^o

CEF = 180^o – 100^o – 25^o

=55^o

In the given figure, AB || CD. If ∠BAO = 60° and ∠OCD = 110°, then ∠AOC = ?

In the given figure, AB || CD. If ∠AOC = 30° and ∠OAB = 100°, then ∠OCD = ?

In the given figure, AB || CD. If ∠APQ = 70° and ∠PRD = 120°, then ∠QPR = ?

In the given figure, x = ?