## Reflection: Developing a Conceptual Understanding Introduction to Trigonometry - Section 2: Discussion Phase

As my students were filling out their tables, I heard many remark, “I bet there’s a pattern here!”  I loved hearing this! And as we began to discuss the trends in their columns, a couple students remarked, “I remember this – isn’t opp/hyp the same thing as sine?”  So at this point, we did name the columns.  I asked if they were familiar with SOHCAHTOA and they all were, which probably helped to make the assigning of the trig function names to the columns go very smoothly.

I went around the room and asked for their trig values for 10o.  Again everyone’s values were quite close, and I asked, “Why?”  After another long moment of silence, a young man shouted out, “I get it.  The triangles are similar!  Angle-Angle Similarity Postulate!”  This was a very cool moment (yes, I’m a math nerd…) because the pieces all seemed to fall in place for the students.

A Great Discussion
Developing a Conceptual Understanding: A Great Discussion

# Introduction to Trigonometry

Unit 7: Right Triangle Trigonometry
Lesson 1 of 3

## Big Idea: Students learn about right triangle trigonometry by creating similar triangles and producing their own trig tables.

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Standards:
Subject(s):
Math, Geometry, Trigonometry, Right Triangle Trigonometry, trig, 10th grade
75 minutes

### Beth Menzie

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