acute angle锐角

acute triangle锐角三角形

adjacent angle邻角

alternate angle错角

alternate exterior angle外错角

alternate interior angle内错角

altitude顶垂线

angle of a circumference圆周角

angular bisector角等分线

arc弧

arc cosine反余弦

arc sine反正弦

arc tangent反正切

axis of symmetry对称轴

base底线

broken line折线

center of a circle圆心

center of figure垂心、形心

central angle圆心角

central symmetry中心对称

centroid垂心、形心

chord弦

circle圆

circular conical surface圆锥面

circular measure弧度制

circumcircle外接圆

circumference圆周

circumscribed circle外接圆

common tangent公切线

complementary angle余角

concave polygon凹多边形

concave polyhedron凹多面体

concentric circles同心圆

cone圆锥

convex polygon凸多边形

convex polyhedron凸多面体

corresponding angle同位角

cosecant余割

cosine余弦

cotangent余切

coversine余矢

cross section截面

cuboid长方体

curved surface曲面

cylinder圆柱体

cylindrical surface圆柱面