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Mathematics 16 Online
OpenStudy (trinketandtristan):

please help! i will post the picture with the proof in the comments I think the answer is CPCTC. Thanks!! Which is the missing phrase in Clara's proof? CPCTC property of parallelograms transitive property vertical angles theorem *Can someone explain why angle ADB and angle CBD come together at the upper right corner of the figure? What property is that?

OpenStudy (trinketandtristan):

OpenStudy (trinketandtristan):

@Steve816

OpenStudy (aggie12341):

hey could you check out my question and help?

OpenStudy (didyouseethat):

Pretty sure its CPCTC

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