Match each set of vertices with the type of triangle they form.

The vertex of the quadratic function is (1.5, -.75)

Ithink it's b sorry if i'm wrong

Hello! i hope this
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.