length
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the side of this rectangle are marked off in centimeters.if the rectangle is enlarged proportionally so that the longer side is 45 cm how long will the shorter side be ?
Length of a long side x length of a short side = area
if you change the side length the area will change. It is possible to change them and not change the area. For example make side twice and long and the other half as long. But in general, if you change the lengths of the sides the area of the rectangle changes.
A diagonal cannot be a side of a rectangle, and a side cannot be a diagonal.
Baguette - the same as the French bread.