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数学竞赛
Pythagorean Theorem
Probability
角和三角形(angles and triangle)
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角和三角形(angles and triangle)
1 Topic
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1 Quiz
等腰三角形
等腰三角形-小测验
Rectangles and Squares
Similar Triangles
Trapezoids
Circles
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Circles
2 Topics
circlePi
areaOfCircle
Volumns
2 of 2
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areaOfCircle
数学竞赛
Circles
areaOfCircle
方法一：
方法二：
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