Including its diagonals there are 6 perpendicular lines
4
A polygon is a generic term describing a closed plane figure bounded by 3 or more straight line segments. It need not have any perpendicular lines.
Normally none but it does have perpendicular lines that meet at right angles.
A square base pyramid has 8 perpendicular lines. These include the 4 edges of the square base perpendicular to each other and the 4 edges connecting the apex of the pyramid to each vertex of the base, which are also perpendicular to the base.
Octagons have no perpendicular lines.
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.
Each of the eight line segments is perpendicular to 2 line segments. So there are 8 pair in all.
4
A polygon is a generic term describing a closed plane figure bounded by 3 or more straight line segments. It need not have any perpendicular lines.
Normally none but it does have perpendicular lines that meet at right angles.
24
if the triangle is a right angle it has 2 perpendicular line segments.
A square base pyramid has 8 perpendicular lines. These include the 4 edges of the square base perpendicular to each other and the 4 edges connecting the apex of the pyramid to each vertex of the base, which are also perpendicular to the base.
4
4, one set at each corner.
Octagons have no perpendicular lines.
An octahedron has 7 perpendicular lines.