Inscribed rectangle

What is the perimeter of a rectangle that is inscribed in a circle whose diameter is 5 dm long?
Answer: 14 dm

Correct result:

p =  12.7614 dm

Solution:

D=5 dm r=D/2=5/2=52=2.5 dm  x=r/3=2.5/3=560.8333 dm y=r2x2=2.520.833322.357 dm  p=4 (x+y)=4 (0.8333+2.357)=12.7614 dm



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Showing 3 comments:
#
Dr Math
not exact solution, because rectangle have two different size

#
Nestor
The solution is ambiguous. Where does x = r/3 came from?

2 years ago  1 Like
#
Dr Math
the solution is ok, bud problem is wrongly formulated.  x = r/3 is assumed to be something calculated. The solution is picked only one from infinity many solutions.

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