## Elementary Geometry for College Students (6th Edition)

A quick trick I learned is that the longest side is the angle that does include both letters. For example, $\angle$A does not include letter B or C, therefore $\overline{BC}$ is the longest side. 45$^{\circ}$, 65$^{\circ}$, 70$^{\circ}$ $\angle$B $\angle$C $\angle$A Side length $\overline{BC}$ is the longest side because the largest angle does not include the letters B or C in the triangle.