the space between two lines or surfaces that are joined, measured in degrees or radians
角度
positioned at a right angle to the horizon or ground, typically moving up or down
垂直, 竖直
the quality of having two halves that are exactly the same, which are separated by an axis
对称
(geometry) a shape that is not two-dimensional because it has height, width, and length
固体, 立体
(geometry) a flat shape with four right angles, especially one with opposing sides that are equal and parallel to each other
矩形, 长方形
(geometry) a round object that every point on its surface has the same distance from its center
球体, 球面
(geometry) a three dimensional shape with a circular base that rises to a single point
圆锥
a solid object with a square base and four triangular sides joined to a point on the top
金字塔