Please answer quickly , i have my math exam tomorrow....

Asked by  | 21st Dec, 2008, 04:12: PM

Expert Answer:

B=90o

So, AC2=AB2+BC2 (By pythagoras theorem)

AC2=AD2-BC2-CD2+BC2 (Using AD2=AB2+BC2+CD2)

Hence, AD2=AC2+CD2

Hence, C=90o

Answered by  | 23rd Dec, 2008, 11:54: AM

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