50 Minute Class, Curriculum, Geometry

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


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



  • 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