Kenny – Resources – GeoGebra

EC 1718 F5 angle at centre twice angle at circumference
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Kenny
EC 1718 F6 intersections
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Kenny
EC 1718 F2 error in measurement
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EC 1718 F1 rotation
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EC 1718 F5 Circle theorems
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Kenny
EC 1718 F5 Cyclic quad
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Kenny
EC 1718 F5 Angles in the same segment (21 August 2017)
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EC 1718 F3 centre of triangles
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Kenny
Errors in Measurement
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Kenny