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Mathematics 17 Online
OpenStudy (anonymous):

A square has a diagonal of length 10 cm. What is the perimeter of the square?

OpenStudy (anonymous):

10√2 cm 20√2 cm 5√2 cm

OpenStudy (anonymous):

5sqrt2

OpenStudy (saifoo.khan):

idkl.

OpenStudy (anonymous):

this can be done very easily by noting that 10sqrt2 and 20 sqrt2 are both greater than 10. the diagonal of a square is always greater than the side, so by elimination, 5sqrt2 must be the only answer

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