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Recognizes kinds of angles, and triangles, similar, congruent and symmetrical shapes.

Perpendicular bisectors
Perpendicular bisectors
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Bisectors
Bisectors
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Angles in a triangle
Angles in a triangle
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Angles
Angles
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Inscribed angle
Inscribed angle
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Remarkable lines of a triangle
Remarkable lines of a triangle
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Triangle
Triangle
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Orthocentre
Orthocentre
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Medians
Medians
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Central symmetry
Central symmetry
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Right triangle
Right triangle
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Line symmetry
Line symmetry
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Quadrilaterals
Quadrilaterals
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Tesselation
Tesselation
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Square tiling
Square tiling
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Art tessellation
Art tessellation
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