GMAT是Graduate Management Admission Test（研究生管理科学入学考试）的简称。主办方GMAC，Graduate ...查看详细
The treasury market dropped in response to a decrease in the value of the dollar and to continued concern that the economy might be growing as fast as to accelerate inflation and drive interest rates higher.
The figure shown above consists of a shaded 9-sided polygon and 9 unshaded isosceles triangles. For each isosceles triangle, the longest side is a side of the shaded polygon and the two sides of equal length are extensions of the two adjacent sides of the shaded polygon. What is the value of a ?