Question

If ∠2 = 50° and lines a and b are parallel, which of the following angles cannot be determined? *-∠1-∠3-∠4-∠8-None of the above

Answer 1

If you have the angle 2, you can deduce its the supplement,which is the angle 4. In this case the supplement is equal to 130°.

Angle 2 and angle 6 are corresponding angles, so they have the same measure.

Angle 4 and angle 8 are corresponding, so they have the same measure.

Angle 2 and angle 1 are vertically opposite angles, so they have the same measure.

Angle 5 and angle 6 are vertically opposite angles, so they have the same measure.

Angle 7 and angle 8 are vertically opposite angles, so they have the same measure.

Angle 4 and angle 3 are vertically opposite angles, so they have the same measure.

Therefore the answer is None of the above.