Q10 of 153 Page 166

In the given figure, AB || CD, ∠BAD = 30° and ∠ECD = 50°. Find ∠CED.

A = D (Pair of alternate angles)

= 30^O

Now, in triangle EDC we have

D = 30^O and C = 50^O

So,

CED = 180 – (C + D)

= 180 – 30 – 50

=100^O

The supplement of an angle is six times its complement. The measure of this angle is

In the given figure, AB || CD || EF. If ∠ABC = 85°, ∠BCE = x° and ∠CEF = 130°, then x = ?

In the given figure, BAD || EF, ∠AEF = 55° and ∠ACB = 25°, find ∠ABC.

In the given figure, BE ⊥ AC, ∠DAC = 30° and ∠DBE = 40°. Find ∠ACB and ∠ADB.