<u>ANS</u>
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<u>Th</u><u>ank</u> <u>You</u> !!!!
#21 the answer is does √ 9^2 + 2^2
a^2 + b^2 = c^2
9^2 + 2^2 = c^2
√ 9^2 + 2^2 = √ c^2