30:90 three equivalent ratios

Divide both terms of the ratio by a same number, as 10, 30 and 15, for example:

“exterior angles of triangles. an exterior (or external) angle is the angle between one side of a triangle and the extension of an adjacent side. try this drag the orange dots on any vertex to reshape the triangle.” look to get to the answer i explained what it means and other things i hope it you .

The answer is 76° i believe