How many vertices are shown in the figure?
How many vertices are shown in the figure?
Note that perpendicular lines are straight lines that create a right angle of 90 degrees at their intersection point.
Let's locate the intersection points that create the right angles in the drawing.
The lines that create the right angles are:
AB is perpendicular to BC
BC is perpendicular to CD
CD is perpendicular to DA
DA is perpendicular to AB
BC is perpendicular to EF
AD is perpendicular to EF
Therefore, in the drawing there are 6 perpendicular lines.
6