# Trigonometry Ratios G.SRT

This learning progression will take place at a 9th grade Algebra 1 classroom. The class is consisted of 32 students where the students have an individual sitting arrangements. This allows the students to work on their own and makes it easy to work with a partner as well. The book use for this class is “Geometry: Integration, Applications, and Connections” by Glencoe and McGraw-Hill. The lesson will cover chapter 8: Applying Right Triangles and Trigonometry but will focus on using sine, cosine, and tangent ratios in order to solve/find the sides and angles of a right triangle.

CCSS.Math:

1.) CCSS.Math.G-SRT.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.

2.) CCSS.Math.G-SRT 7

Explain and use the relationship between the sine and cosine of complementary angles.

3.) CCSS.Math.G-SRT.8

Use trigonometric ratios and the Pythagorean Theorem to solve right triangles in applied problems.

Learning Progression Trigonometry Ratios-1fej0wt