Q39 of 153 Page 148

In the given figure, AB || DC, ∠BAD = 90°, ∠CBD = 28° and ∠BCE = 65°. Then ∠ABD = ?

∠BCE = ∠ABC =65^o (Alternate Angles)

∠ABC = ∠ABD + ∠DBC

65^o = ∠ABD + 28^o

∠ABD = 65 – 28

= 37^o

In a ΔABC its is given that ∠A : ∠B : ∠C = 3 : 2 : 1 and CD ⊥ AC. Then ∠ECD = ?

In the given figure, AB || CD. If ∠ABO = 45° and ∠COD = 100° then ∠CDO = ?

For what value of x shall we have l || m?