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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