none, no
Two.
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Do pyramids have perpendicular faces ?
Including its diagonals there are 6 perpendicular lines
A square has four perpendicular sides.
The adjacent sides of a square are perpendicular.
A trapezium has no right angles therefore there are no perpendicular lines. If it had perpendicular lines, it would be a square or rectangle.
Yes because the 4 corners of a square are perpendicular in that they meet at right angles and also the diagonals of a square are perpendicular
No, a square has four perpendicular sides.
Perpendicular would be at a right angle. If your sides are abcd, then ab, bc, cd, and da are perpendicular pairs.
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