How many pairs of perpendicular lines are shown in the diagram below?
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How many pairs of perpendicular lines are shown in the diagram below?
Let's remember that perpendicular lines are lines that intersect at a right angle of 90 degrees.
Our right angles are:
The lines that form angle ABC are: AB+BC
The lines that form angle BCD are: BC+CD
The lines that form angle CDE are: CD+DE
The lines that form angle DEF are: DE+EF
The lines that form angle EFA are: EF+FA
The lines that form angle FAB are: FA+AB
Since in the drawing we have 6 angles of 90 degrees marked, we must have 6 pairs of perpendicular lines.
6
What do the four figures below have in common?
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