The regular hexagon has an interior angle of 60°. what is the angle of rotation when vertex m is mapped onto vertex o in a counterclockwise rotation?
a.
60°
b.
120°
c.
240°
d.
360°

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since the cosine is the ratio of the adjacent side to the hypotenuse, you can see that cos 60° = ½. answer. according to the property of cofunctions (topic 3), sin 30° is equal to cos 60°. sin 30° = ½.