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* *Reflection: Checks for Understanding
Re-Calling Pythagoras' Theorem - Section 4: Activity and Exit Ticket

At the end of today's class, we had 2-3 minutes left! Wow, it doesn't happen often but when it does, I like to use this time to review important topics that we haven't reviewed in awhile. Today, I wrote on the board two points and the words perpendicular bisector. I then asked students to tell me how they could find the perpendicular bisector. Students led the discussion by first suggesting that we find the bisector part using the midpoint. Then, we reviewed how to show that two lines were perpendicular. It was great to hear that my students remembered that perpendicular lines had negative reciprocals but then I asked them, "how do you know what to identify as negative reciprocals?" We then were able to review slope!

It was a great use of time and helped them to review for upcoming mid-term!

*Checks for Understanding: Extra Minute at End of Class*

# Re-Calling Pythagoras' Theorem

Lesson 3 of 4

## Objective: SWBAT apply Pythagorean Theorem to real-world problems involving right triangles.

#### Do Now

*10 min*

In this Do Now, students will have an opportunity to review finding the length of a line segment and also finding the midpoint of this segment. These two topics are skill based practice and require students to remember the distance and midpoint formulas. Also, the distance formula uses similar algebra skills, like squares and square roots, which may help students see patterns between we first derived the distance formula (MP 8).

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#### Computer Lab Practice

*20 min*

This section of the lesson really allows you to differentiate instruction to students' abilities. Some students may be able to handle more challenging problems that are based on SAT-like questions, and while in the computer lab, these students can practice these complex questions while looking for repeated reasoning(MP 1 and 8). Students who may be struggling with Pythagorean Theorem can also complete these more straight-forward questions and receive feedback on their work.

You can also assign these extra online problems for practice and/or homework.

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- UNIT 1: Introduction to Geometry: Points, Lines, Planes, and Angles
- UNIT 2: Line-sanity!
- UNIT 3: Transformers and Transformations
- UNIT 4: Tremendous Triangles
- UNIT 5: Three Triangle Topics
- UNIT 6: Pretty Polygons
- UNIT 7: MidTerm Materials
- UNIT 8: Circles
- UNIT 9: 3-D Shapes and Volume
- UNIT 10: Sweet Similar Shapes
- UNIT 11: Trig Trickery
- UNIT 12: Finally Finals