导读：sat吧,end point端点equilateral triangle等边三角形、正三角形Euler's formula欧拉公式excentre旁心exterior angle外角exterior angles on the same side同旁外角face angle面角foot of a perpendicular垂足foundations of geometry几何学geimetrical element几何元素generatrix母线generator母线geometric construction几何作图geometric figure几何图形half angle半角half line半线horizonal line水平线incentre内心incircle内切圆ineterior on the same side同旁内角initial side of anangle角的始边inscribed circle of a triangle三角形内切圆interior angle内角interpolation插值法,内推法intersecting lines相交线intersection of two lines两线相交intersection point交点,end point端点equilateral triangle等边三角形、正三角形Euler's formula欧拉公式excentre旁心exterior angle外角exterior angles on the same side同旁外角face angle面角foot of a perpendicular垂足foundations of geometry几何学geimetrical element几何元素generatrix母线generator母线geometric construction几何作图geometric figure几何图形half angle半角half line半线horizonal line水平线incentre内心incircle内切圆ineterior on the same side同旁内角initial side of anangle角的始边inscribed circle of a triangle三角形内切圆interior angle内角interpolation插值法,end point端点equilateral triangle等边三角形、正三角形Euler's formula欧拉公式excentre旁心exterior angle外角exterior angles on the same side同旁外角face angle面角foot of a perpendicular垂足foundations of geometry几何学geimetrical element几何元素generatrix母线generator母线geometric construction几何作图geometric figure几何图形half angle半角half line半线horizonal line水平线incentre内心incircle内切圆ineterior on the same side同旁内角initial side of anangle角的始边inscribed circle of a triangle三角形内切圆interior angle内角interpolation插值法,end point端点equilateral triangle等边三角形、正三角形Euler's formula欧拉公式excentre旁心exterior angle外角exterior angles on the same side同旁外角face angle面角foot of a perpendicular垂足foundations of geometry几何学geimetrical element几何元素generatrix母线generator母线geometric construction几何作图geometric figure几何图形half angle半角half line半线horizonal line水平线incentre内心incircle内切圆ineterior on the same side同旁内角initial side of anangle角的始边inscribed circle of a triangle三角形内切圆interior angle内角interpolation插值法,sat和托福end point端点equilateral triangle等边三角形、正三角形Euler's formula欧拉公式excentre旁心exterior angle外角exterior angles on the same side同旁外角face angle面角foot of ...