square
yes
Only if the angles formed are right angles otherwise they form vertical opposite equal angles
false
If two lines intersect at right angles then they are perpendicular!
The angles sum to 90° and the angles are complementary
square
Yes
That is an important theorem in geometry: if two lines intersect to form adjacent congruent angles, then the lines are perpendicular. Those congruent angles would be right angles.
Yes.
yes
false
Only if the angles formed are right angles otherwise they form vertical opposite equal angles
false
No. Perpendicular lines for right angles. That is why they are called perpendicular.
A rectangle's perpendicular lines are ALWAYS adjacent to eachother
In a trapezium, there are two perpendicular lines. These perpendicular lines are the diagonals of the trapezium. The diagonals of a trapezium are the line segments that connect non-adjacent vertices of the trapezium and intersect each other at a right angle.