pythagoras theorem

the diagonal of a rectangle is 120cm. one side has a length of 70cm. find: the area of the rectangle
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rite triangel...long side120 & 1 other side=70

other side=sqrt(120*120 -70*70)

=sqrt(14,400 - 4,900)

=sqrt(9500)

=97.46794345

or bout 97.47
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