Write an expression to show the sum of x and y

“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 .

Will show energy on x axis time on the y axis feel free to ask any questions

The question of the answer is found in the pic