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Math·Geometry and Trigonometry·Lines, angles, and triangles

easy

Each side of equilateral triangle R is multiplied by a scale factor of $k$ to create equilateral triangle U. The length of each side of triangle U is greater than the length of each side of triangle R. Which of the following could be the value of $k$?

A

$\frac{31}{32}$

B

$1$

C

$\frac{32}{31}$

D

$0$