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| # | 英语 | 汉语 | |
|---|---|---|---|
| 1 | vertex | n. 顶点：the point where two lines meet | |
| 2 | property | n. 性质：a quality or feature of something | |
| 3 | endpoint | n. 端点：the point at the end of a line segment | |
| 4 | straight angle | n. 平角：an angle of 180 degrees | |
| 5 | equilateral triangle | n. 等边三角形：a triangle with all sides equal | |
| 6 | scalene triangle | n. 不等边三角形：a triangle with no equal sides | |
| 7 | right triangle | n. 直角三角形：a triangle with one right angle | |
| 8 | solid | n. 立体：a 3D shape | |
| 9 | polyhedron | n. 多面体：a 3D shape with flat faces | |
| 10 | rectangular solid | n. 长方体：a box-shaped 3D object | |
| 11 | heptagon | n. 七边形：a shape with seven sides | |
| 12 | octagon | n. 八边形：a shape with eight sides | |
| 13 | nonagon | n. 九边形：a shape with nine sides | |
| 14 | decagon | n. 十边形：a shape with ten sides | |
| 15 | equilateral | adj. 等边的：having all sides equal | |
| 16 | number line | n. 数轴：a line showing numbers in order | |
| 17 | quadrant | n. 象限：one of four parts of a coordinate plane | |
| 18 | acute triangle | n. 锐角三角形：a triangle with all angles less than 90 degrees | |
| 19 | obtuse triangle | n. 钝角三角形：a triangle with one angle more than 90 degrees | |
| 20 | compass | n. 圆规：a tool used to draw circles |