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Title: Khan Academy | Free Online Courses, Lessons & Practice
Interests: university college, community, software, search, books
Keywords: khan academy, area of a circle, area of a triangle
445 6.7 340 419
Title: Math is Fun
Interests: department, students, math resources, calculator, learning
Keywords: standard deviation, area of a circle, standard deviation formula
3'049 5.3 9'657 1'982