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Mathematics 20 Online
OpenStudy (anonymous):

prove that vertical angles are congruent given ab intersects cd at point e. prove

OpenStudy (anonymous):

diagram pls???

OpenStudy (anonymous):

ok holf on

OpenStudy (anonymous):

OpenStudy (anonymous):

1. angles on one side of a line add to 180 2. <CEA + <AED = 180 3. <AED + <BED = 180 <AED = 180 - <BED sub "180 - <BED" into equation 1 for "<AED" 4. <CEA + 180 - <BED = 180 <CEA - <BED = 0 <CEA = <BED QED.

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