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Mathematics 11 Online
OpenStudy (falco276):

Look at the photo frame.

OpenStudy (falco276):

OpenStudy (falco276):

Which statement is true about the photo frame? It is rectangular because the diagonal is less than the sum of 21 and 13. It is not rectangular because diagonal DB bisects angle ADC and angle ABC. It is not rectangular because the sum of 13 squared and 21 squared is not equal to 23 squared. It is rectangular because side DC meets side BC at 90 degrees.

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