Perpendicular Lines, Slope, Rays, and Segments  Geometry  Summary and Q&A
TL;DR
Perpendicular lines intersect at a 90degree angle, and their slopes are negative reciprocals of each other.
Key Insights
 🔺 Perpendicular lines intersect at right angles, forming a 90degree angle.
 The slope of a perpendicular line is the negative reciprocal of the given line's slope.
 🙌 Segments and rays can also be perpendicular, with a 90degree angle between them.
 🔺 The total measure of an angle in a perpendicular scenario is the sum of the two smaller angles formed.
 🔺 Algebraic equations can be used to find the measure of angles in perpendicular scenarios.
 🆘 Factoring and solving equations can help find the value of variables and angle measures.
 👋 Checking the answer by confirming that the angles add up to 90 degrees is a good practice.
Transcript
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Questions & Answers
Q: How do you determine if two lines are perpendicular to each other?
Two lines are perpendicular if they intersect at a 90degree angle, forming right angles.
Q: What is the relationship between the slopes of perpendicular lines?
The slopes of perpendicular lines are negative reciprocals of each other. To find the slope of a perpendicular line, flip the fraction and change the sign.
Q: Can segments and rays be perpendicular?
Yes, segments and rays can be perpendicular if they intersect at a 90degree angle.
Q: How do you find the measure of an angle in a perpendicular scenario?
In a perpendicular scenario, you can find the measure of an angle by adding the measures of the two smaller angles formed.
Summary & Key Takeaways

Perpendicular lines intersect at right angles, with a 90degree angle between them.

The slope of a perpendicular line is the negative reciprocal of the slope of the given line.

Segments and rays can also be perpendicular, with a 90degree angle between them.