How many vertices are shown in the figure?
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How many vertices are shown in the figure?
Note that perpendicular lines are straight lines that create a 90-degree angle at their intersection point.
Let's locate the intersection points that create right angles in the drawing:
The lines that create the marked right angles are:
AB is perpendicular to CD
AB is perpendicular to EF
EF is perpendicular to IJ
IJ is perpendicular to GH
Therefore, there are 4 perpendicular lines in the drawing.
5
Determine which lines are parallel to one another?
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