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Properties of Rectangles

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Explanations 1

Rectangles are parallelograms with right angles. This means that all their angles are 90 degrees, their diagonals bisect, and their two pairs of sides are parallel. Area and Per…
By Abigale Kim (a+bi), Alex Federspiel

Problems 2

If, in rectangle ABCD, side A has length 444 and side B has length 555, what is the perimeter of ABCD?
Suppose the intersection of ACACAC and BDBDBD is called PPP. What is: AC−BPAC - BPAC−BP