Stephanie Lalos. Theorem 50 The sum of measures of the three angles of a triangle is 180 o A B C 60 4080 o.
Section 3.7 Angle-Side Theorems
Chapter 9.10 Trigonometric Ratios
Section 3.2 Three Ways to Prove Triangles Congruent
Section 2.4 Theorems By Kacey Olver, Tom Jubon, and Laine Murphy.
Section 7.1 – Triangle Application Theorems
