1. In the following figure, ∠1 + ∠2 + ∠3 = 230°, then the measure of ∠4 is equal to

2. In the following figure EF || GH. Then, the measure of ∠x is equal to

3. In the following figure, l || m. Find the measure of ∠ x.

4. In the following figure, AB || DG and BC || EF. Also, ∠ABC = 60°. Then, the measure of ∠DEF is

5. Find the value of x in the following figure, if l || m.