Question

Find the unknown angles,



Please help me friends :(

Answer 1

1) 40°

2)65°

3)75°

............

Answer 2

$\angle \: 1 = 40 \degree \: (alternate \: interior \: angles)$

/_ 1 + /_ 2 + 75° = 180° (linear pair)

40° + /_2 + 75° = 180°

115° + /_ 2 = 180°

/_ 2 = 65°

Now, in∆

40° + 2 + 3 = 180° ( angle sum Property)

40°+65° +3 = 180°

/_3 = 75°