Area of Sector and Length of Arc

Topic:Area

Set your own problem by changing the angle and radius using the sliders, and ticking two of the boxes to reveal values. Using these values find the two missing values. Check your answer by revealing the answers.

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畫三角形
Forming Similar Triangles
Ringed Polyhedra
MC #2
Luxembourg Symbol

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Example 2
snowman
Addition of vectors final without left
Geo #2.2
Venn diagram

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Symmetry
Percentages
Standard Deviation
Probability
Scalene Triangles