Rectangle - parallelogram

A rectangle is circumscribed by a circle with a radius of 5 cm. The short side of the rectangle measures 6 cm. Calculate the perimeter of a parallelogram ABCD, whose vertices are the midpoints of the sides of the rectangle.

Correct answer:

o =  20 cm

Step-by-step explanation:

r=5 cm a=6 cm u=2 r=2 5=10 cm  u2 = a2+b2  b=u2a2=10262=8 cm  x=(a/2)2+(b/2)2=(6/2)2+(8/2)2=5 cm  o=4 x=4 5=20 cm

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