perpendicular
two lines that are perpendicular form right angles
Perpendicular lines form right angles when they intersect.
Perpendicular lines intersect to form right angles
Perpendicular lines form right angles at their intersections.
All of them. If its truly intersecting lines, they have to form right angles. All of them. If its truly intersecting lines, they have to form right angles.
Perpendicular Lines form right angles at their point of intersection
By definition, perpendicular lines form right angles.
right angles
The contrapositive to the statement, "if two lines intersect to form right angles, then they are perpendicular," is "if two lines are not perpendicular, then they do not form right angles."
Two lines that intersect to form four right angles would be perpendicular lines.
Two lines that intersect to form right angles are perpendicular.
If two lines intersect at right angles then they are perpendicular!