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msumner
All pairs of vertical angles are equal. True False
@e.cociuba True but how ?
cause its the properties of a verticle angles:)
|dw:1359687246158:dw| x and y are a linear pair, so they are supplementary so x+y = 180 y and z are a linear pair, so they are supplementary so y+z = 180 or z+y = 180 we now have x+y = 180 z+y = 180 Both equal 180, so by substitution, we can say x+y = z+y and if we subtract y from both sides using the subtraction property of equality, we get x = z which proves that vertical angles x and z are congruent