如图，一个空间几何体的正视图、侧视图、俯视图为全等的等腰直角

如图，一个空间几何体的正视图、侧视图、俯视图为全等的等腰直角三角形，如果直角三角形的直角边长为1，那么这个几何体的表面积为

（A）（B）

（C）（D）

答案

A 提示:几何体如图,有三个面为等腰直角三角形,一个侧面为正三角形

所以

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