construct a rectangle wxyz where wx=5cm and wy = 7cm.

I only want to know the length of wz=? using hypotenuse property.

to construct a rectangle, there is no need to calculate wz.

steps of constructions:

1. draw a line wx = 5 cm

2. at point w , draw a right angle wp and at point x , draw a right angle xq.

3. from the point w, draw an arc of length 7 cm , let it intersect xq at y.

4. from the point x, draw an arc of length 7 cm, let it intersect wp at z.

join yz.

thus the rectangle wxyz is the required rectangle.

hope this helps you.

cheers!! 

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