Question

find the angles marked with letters.

Answer 1

Step-by-step explanation:

In ∆1,

through exterior angle property

e+e = 42+50+50

i.e. 2e = 142°

therefore,

e = 71°

In ∆2,

one of the angles = 88° (vertically opposite angles)

through angle sum property,

e+f+88° = 180°

71+f = 92

f = 21°