1 of 8

B

A

Mark all the points that are the same distance from A and B

Slides are CC BY NC Kendall Hunt Publishing. Curriculum excerpts are CC BY Illustrative Mathematics.

Warm-up

2 of 8

Construction Techniques 1: Perpendicular Bisectors

Unit 1

Lesson 3

Constructions and Rigid Transformations

GEOMETRY

3 of 8

Unit 1 ● Lesson 3

I can construct a perpendicular bisector.
I understand what is special about the set of points equidistant from two given points.

Learning

Targets

Geometry

4 of 8

conjecture

Unit 1 ● Lesson 3

A reasonable guess that you are trying to either prove or disprove.

Slides are CC BY NC Kendall Hunt Publishing. Curriculum excerpts are CC BY Illustrative Mathematics.

Glossary

5 of 8

perpendicular bisector

Unit 1 ● Lesson 3

The perpendicular bisector of a segment is a line through the midpoint of the segment that is perpendicular to it.

Slides are CC BY NC Kendall Hunt Publishing. Curriculum excerpts are CC BY Illustrative Mathematics.

Glossary

6 of 8

How Well Can You Slice It?

Unit 1 ● Lesson 3 ● Activity 3

Why are these NOT perpendicular bisectors?

Slides are CC BY NC Kendall Hunt Publishing. Curriculum excerpts are CC BY Illustrative Mathematics.

7 of 8

How Well Can You Slice It?

Unit 1 ● Lesson 3 ● Activity 3

Use the tools available to find the perpendicular bisector of segment PQ.

Slides are CC BY NC Kendall Hunt Publishing. Curriculum excerpts are CC BY Illustrative Mathematics.

8 of 8

Walk the Line

Unit 1 ● Lesson 3 ● Activity 4

Here is a hallway with lasers:

Imagine that you must cross the hallway while staying an equal distance from each laser. If you get closer to one laser than the other, it will blast you. Use a compass and straightedge to draw a safe path through the hallway.

Slides are CC BY NC Kendall Hunt Publishing. Curriculum excerpts are CC BY Illustrative Mathematics.

Lesson Synthesis

Cool-down