小升初英语奥数题....docVIP

常用数学术语的英语表达：1立方??? one cubic 1平方米???one square metre几何??? geometry 点?? ??? point线?????line 面??????plane直线????a straight 曲线??? ?curved line近似值???an approximate value垂直线 ?? a vertical 水平线 ??a horizontal line三角形的底?the base of a triangle三角形的两个腰??the two sides of a triangle直角????a rigt angle 锐角????an acute angl 钝角?? ? an obtuse angle 长方形 ?? a rectangle 正方形 ?? a square 多边形???a polygon 圆心 ??the centre of a circle 圆的直径 ? the diameter of a circle圆的半径 ? the radius of a circle 半圆????a semicircle 弧?????an arc 圆柱体???a cylinder 球体????a spheroid?常用加减乘除的英语表达：四加五等于九??