Which of the following must always be true about vertical angles

Aplot of land is shaped like a quadrilateral. fences are built on the diagonal to divide the area into 4 sections. what is vi to the nearest tenth? gv = 6.55fv = 5.84vh = 3.27vi = ?

Which equation results from adding the equations in this system? x+6y=9 and -x+2y=-15

Mackenzie needs to determine whether the rectangles are proportional. which process could she use? check all that apply.