In square ABCD. AD = 8b-9: AB = 9-b, Find CD
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Step-by-step explanation:
all side of square is equal
AD=AB
8b-9=9-b
9b=18
b=18/9
b=2
now
AB= 9 - b
AB= 9-2
AB= 7
AB=AC (Side of square are equal)
AC=7
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