AMC8 1997

AMC8 1997 · Q10

AMC8 1997 · Q10. It mainly tests Fractions, Area & perimeter.

What fraction of this square region is shaded? Stripes are equal in width, and the figure is drawn to scale.

这个正方形区域中有多少分数被涂黑？条纹宽度相等，且图形按比例绘制。

(A) \(\frac{5}{12}\) \(\frac{5}{12}\)

(B) \(\frac{1}{2}\) \(\frac{1}{2}\)

(D) \(\frac{2}{3}\) \(\frac{2}{3}\)

(E) \(\frac{5}{6}\) \(\frac{5}{6}\)

Answer

Correct choice: (C)

正确答案：（C）

Solution

The figure consists of 36 small squares, 21 shaded, \(\frac{21}{36} = \frac{7}{12}\).

图形由 36 个小正方形组成，21 个被涂黑，\(\frac{21}{36} = \frac{7}{12}\)。

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