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If points X and Y are two distinct points in the coordinate plane, which of the following can have more than one possible value?
A. The circumference of a circle with diameter XY.
B. The area of a square with diagonal XY.
C. The perimeter of a right iscosceles triangle with a leg XY.
D. The area of a circle with chord XY.
E. The area of an equilateral triangle with base XY.
I got this question on my Kaplan
I answered C but it turns out that D is the correct answer.
While I kind of understand it. It'd be great to see some reasoning for why C is wrong.[/img]