Select the correct alternative and fill in the blank in the following statements.

Two parallel lines are intersected by a transversal. If measure of one of the alternate interior angles is 75° then the measure of the other angle is .............

Select the correct alternative and fill in the blank in the following statements.

A transversal intersects two parallel lines. If the measure of one of the angles is 40° then the measure of its corresponding angle is .............

Select the correct alternative and fill in the blank in the following statements.

In ΔABC∠ A =760, ∠ B = 480, ∠ C = …

Ray PQ and ray PR are perpendicular to each other. Points B and A are in the interior and exterior of ∠QPR respectively. Ray PB and ray PA are perpendicular to each other.

Draw a figure showing all these rays and write -

i. A pair of complementary angles

ii. A pair of supplementary angles.

iii. A pair of congruent angles.

iii. A pair of congruent angles.

Prove that, if a line is perpendicular to one of the two parallel lines, then it is perpendicular to the other line