3. Which anglesa. -310°b. -50°c. 670°d. 50°are co-terminal to 310°? Circle all that apply.

Co-terminal angles are angles that have a common terminal side. To find the coterminal angles of a specific angle sum 360º, or subtract 360º
For the given angle:
[tex]\begin{gathered} 310º\pm360º \\ \\ 310º+360º=670º \\ 310º-360º=-50º \end{gathered}[/tex]Then, the next angles are co-terminal for angle 310º:b. -50ºc. 670º