not stable; changing.
The amount of space a 3-D object can hold.
the length of a segment whose endpoints are the vertex and a point on the plane of the base that is perpendicular to the plane of the base.
the distance between the planes of the bases.
the distance between the bases of a trapeziod.
the perpendicular segment from a vertex to the line containing the opposite side of a triangle.
see coordinate geometry.
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The part of the body that cannot be reached (to scratch), usually the space between the shoulder blades.
Tirana, 阿尔巴尼亚
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