有关图形上的附属物

altitude                    高?

depth                       深度?

width                       宽

side                        边长?

circumference, perimeter    周长?

surface area                表面积?

volume                      体积?

arm                         直角三角形的股?

cross section               横截面?

center of a circle          圆心

chord                       弦?

radius                      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?

included side               夹边?

leg                         三角形的直角边?

median of a triangle        三角形的中线?

base 底边，底数（e.g. 2的5次方，2就是底数）?

opposite                    直角三角形中的对边

midpoint                    中点?

endpoint                    端点?

vertex                      顶点?

tangent                     切线的?

transversal                 截线?

intercept                   截距??