If two straight line intersect each other in such a way that one of the angles formed measures 90∘, show that each of the remaining angles measures 90∘.

If two straight line intersect each other in such a way that one of th

1.	If two straight line intersect each other in such a way that one of the angles formed measures 90∘, show that each of the remaining angles measures 90∘.
Answer» If two straight line intersect each other in such a way that one of the angles formed measures $90^{\circ}$ , show that each of the remaining angles measures $90^{\circ}$ .