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- Year 8
Geometrical properties: polygons
Lessons (16)
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I can calculate with angles at a point, angles on a line and vertically opposite angles.
I can confidently state the sums of the angles around a point and on a straight line.
I can classify triangles and know their relevant properties.
I can use conventional terms and notations for lines, rays, segments and angles.
I can recognise that a pair of parallel lines traversed by a straight line produces equal corresponding angles.
I can recognise that a pair of parallel lines traversed by a straight line produces equal alternate angles.
I can recognise that a pair of parallel lines traversed by a straight line produces supplementary co-interior angles.
I can use facts about a pair of parallel lines traversed by a straight line.
I can demonstrate and prove that in a triangle, the sum of the interior angles is 180°.
I can use the fact that the interior angles of any triangle sum to 180° to find the size of missing angles.
I can find the interior angle of any polygon.
I can use reasoning to derive the sum of interior angles in multiple ways.
I can find the sum of the exterior angles of a polygon.
I can find the interior and exterior angles of regular polygons.
I can solve problems that require a combination of angles facts to identify values of missing angles, providing explanations of reasoning and logic used.
I can use my knowledge of polygons to solve problems.
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