if B lies between A and C , AC = 21 cm and BC = 10 cm , what is AB square

@ Nischay: your friend has given correct explanation of the question and the final answer has to be 121 and not 141.

@ Shreyas: Good attempt! Keep it up. Keep posting!

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AB = AC - BC

AB = 21 - 10

AB = 11

11^2 = 121.

Therefore AB square = 141

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