If N Is an Integer, N · 180° Represents an Integer

Multiple Choice

If n is an integer, n · 180° represents an integer multiple of 180°, and (2n + 1) · 90° represents an odd integer multiple of
90°. Decide whether the expression is equal to 0, 1, -1, or is undefined.
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A) Acute, scalene
B) Obtuse, equilateral
C) Right, isosceles
D) Obtuse, isosceles