Will mark determine whether the graphs of the given equations are parallel, perpendicular or neither
y=x+9
y=-x+1

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“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 .

Wait what the question