coterminal

adjective

co·​terminal

(ˈ)kō+

: having different angular measure but with the vertex and sides identical

—used of angles generated by the rotation of lines about the same point in a given line whose values differ by an integral multiple of 2π radians or of 360°

coterminal angles measuring 30° and 390°

Word History

Etymology

co- + terminal entry 1

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