The shape in the figure below contains only right angles.
Are there 12 pairs of perpendicular lines?
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The shape in the figure below contains only right angles.
Are there 12 pairs of perpendicular lines?
Remember that perpendicular lines form a 90-degree angle.
We will mark on the figure all the right angles formed by the intersections of the lines as follows:
The figure shows that there are 12 right angles, therefore there are 12 pairs of perpendicular lines.
Yes
Determine which lines are parallel to one another?
Look for the small square symbol at the intersection point! This marker specifically shows a 90-degree angle. Without this symbol, you can't assume lines are perpendicular.
All perpendicular lines intersect, but not all intersecting lines are perpendicular. Lines are only perpendicular when they meet at exactly 90 degrees.
Each right angle is formed by two lines meeting, so we count pairs. One right angle = one pair of perpendicular lines!
No! You need to count the right angles (marked with squares), not just lines. Each right angle represents one pair of perpendicular lines.
Remember, only intersections with right angle markers count as perpendicular pairs. Other intersections might be at different angles and don't count for this problem.
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