TEKS: Chapter 111. Mathematics See All Teacher Resources

111.41.c.8

(8) Similarity, proof, and trigonometry. The student uses the process skills with deductive reasoning to prove and apply theorems by using a variety of methods such as coordinate, transformational, and axiomatic and formats such as two-column, paragraph, and flow chart. The student is expected to:

• (A) prove theorems about similar triangles, including the Triangle Proportionality theorem, and apply these theorems to solve problems; and

• (B) identify and apply the relationships that exist when an altitude is drawn to the hypotenuse of a right triangle, including the geometric mean, to solve problems.