Understanding Perpendicular Lines
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Beginner
Start here! Easy to understand
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Beginner Explanation
Perpendicular lines form a $90^\circ$ angle with each other. When two lines intersect at this angle, they are perpendicular.
Practice Problems
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1
Quick Quiz
Single Choice Quiz
Beginner
Let O be the intersection of lines AB and CD. If $AB \perp CD$, what is $\angle B O D$?
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2
Real-World Problem
Question Exercise
Intermediate
Real-world Scenario
Imagine you are designing a skateboard ramp that needs to be perpendicular to the ground. How would you ensure the ramp forms a $90^\circ$ angle with the ground?
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3
Thinking Challenge
Thinking Exercise
Intermediate
Think About This
Consider two streets that need to be perpendicular for proper traffic flow. How would you verify the streets form a $90^\circ$ angle?
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4
Challenge Quiz
Single Choice Quiz
Advanced
Let O be the intersection of lines AB and CD. Which of the following is true for lines $AB$ and $CD$ if $AB \perp CD$?
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Recap
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