Blindsided (Updated!)

What’s the safest way to position car mirrors?

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Blindsided (Updated!)

What’s the safest way to position car mirrors?

Login to add lessons to your favorites

Check it out! This lesson was just updated in September 2024, and we hope you love the new and improved version. If you've already prepped an earlier version, fear not, you can still find those here through Thursday December 5, 2024.

2023-2024 Versions

In the fall of 2024, Citizen Math released updated versions of every lesson in our library, plus a few new ones! We know you may have already prepped an earlier version or planned a repeat of last year, so we're continuing to make these earlier versions available through Thursday December 5, 2024.

You can find the new lessons through the regular search, and we hope you love them as much as we do. You can read more about these updates in Our Community.

Even under ideal conditions, driving is dangerous. To make the experience as safe as possible, cars come with a lot of mirrors to help drivers see what’s happening around them. So how do people typically position their car’s mirrors…and how should they position them?

In this lesson, students use reflections to model what drivers see in their rear-view and side-view mirrors. They see how adjusting the mirrors impacts the areas that drivers can see, and assess some common rules of thumb when it comes to the best way to orient your mirrors.

REAL WORLD TAKEAWAYS

  • A rear-view mirror should be angled slightly toward the driver in order to see the area directly behind the car.
  • Side-view mirrors will provide the most helpful visibility if they’re positioned so that you cannot see the edge of your own car but so that you can see an adjacent car just out of the area reflected in the rear-view mirror.

MATH OBJECTIVES

  • Make formal geometric constructions including perpendicular bisectors, parallel lines, and angle reflections

This complex task is best as a culminating unit activity after students have developed formal knowledge and conceptual understanding.
Expressions & Equations
Expressions & Equations
Content Standards G.CO.1 Know precise definitions of angle, circle, perpendicular line, parallel line, and line segment, based on the undefined notions of point, line, distance along a line, and distance around a circular arc.
Mathematical Practices MP.1 Make sense of problems and persevere in solving them. MP.4 Model with mathematics.

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