cube立方体，立方数?
rectangular solid长方体?
regular solid/regular polyhedron正多面体?
circular cylinder圆柱体?
cone圆锥?
sphere球体?
solid立体的??
6. 有关图形上的附属物
altitude高?
depth深度?
side边长?
circumference3, perimeter周长?
radian弧度?
surface area 表面积?
volume体积?
arm直角三角形的股?
cros ssection横截面?
center of acircle圆心
chord弦?
radius5半径?
angle bisector角平分线?
diagonal对角线?
diameter直径?
edge棱
face of a solid立体的面?
hypotenuse斜边?
included side夹边?
leg三角形的直角边
medianofatriangle三角形的中线?
base底边，底数