Two lines are perpendicular in Euclidean Geometry if ...

Question

A. They split each other in half
B. They are in the same plane and never intersect
C. they meet at a vertex
D. they intersect and form 90 degree angles

Answer 1

The correct answer is D. they intersect and form 90 degree angles.

In Euclidean Geometry, two lines are considered perpendicular if they intersect at a point and the angles formed at that intersection are right angles (90 degrees).