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Learning Goal: Allow students to explore and discover trigonometric ratios and apply discoveries to solve problems.

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Note

This lesson was inspired by Kate Nowak, Lisa Bejarano, and New Visions.

Classwork

• Estimation – Perimeter 1
• Warm Up
• Notes Preparation Slides
• Notes

 Standards

• Common Core
  • HSG.SRT.C.6 – Understand that by similarity, side ratios in right triangles are properties of the angles in the triangle, leading to definitions of trigonometric ratios for acute angles.
  • HSG.SRT.C.8 – Use trigonometric ratios and the Pythagorean Theorem to solve right triangles in applied problems.
• TEKS
  • G.9(A) – determine the lengths of sides and measures of angles in a right triangle by applying the trigonometric ratios sine, cosine, and tangent to solve problems