Student Learning Target:
 I can use similarity to define trigonometric ratios as properties of the angles in a right triangle.
Opening problem:
 List all of the properties you know about similar triangles.
 How certain are you that your theoretical values are accurate? Why?
Here is your chart from Thursday:
In conclusion:

The trigonometric ratios are SINE, COSINE, and TANGENT

These ratios are properties of the angles in similar triangles.

So, are rectangles and squares similar?
We can now define similarity, with all of it’s properties!
But wait, what are the trig ratios (and how can I remember them)?

Let’s build some reminders for ourselves!
Next Step: A Fascinating Chart
Handouts:
 Problem Set #3
 Final part of project (Now due Thursday, February 14th)
 Delta Math
Example Problem:
Jasmine has two triangles with equal angle measurements:
The sides of one triangle are 4, 6, and 8. The sides of the other triangle are 9, 6, and 12. She says that the triangles are not similar because:
4/9 = 0.444, 6/6= 1, and 8/12 = 0.667
Do you agree with Jasmine? Thoroughly explain your answer.
Work time!
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