Plane geometry is fun to study.
平面几何的学习是有趣的。
In addition, there are round, square, cross, such as plane geometry.
此外，还有圆形、正方形、十字形等几何形状平面。
The plane geometry is one of middle school mathematics basic contents.
平面几何是中学数学的基本内容之一。
Remember from geometry you need 3 points to make a plane?
记不记得几何里所学的3点成面？
Remember from geometry you need 3 points to make a plane?
记不记得几何里所学的3点成面？
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