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KS2 · Maths · Year 3

Investigate and draw other polygons with right angles

Right angles

Primary to sixth form

Investigate and draw other polygons with right angles

Investigate different ways of decomposing a polygon

Investigate lines of symmetry in 2D shapes by folding

Investigate symmetry and symmetrical patterns

Investigate the shapes made when rectangles are cut on the diagonal

Join four right angles at a point using different right-angled polygons

Know that a rectangle is a four-sided polygon with four right angles

Know that a regular polygon has sides that are the same length and angles that are the same size

Know that a right angle describes a quarter turn

Know that a square is a rectangle in which the four sides are of equal length

Know that perimeter can be calculated by adding together the side lengths of a 2D shape

Know that perimeter is measured in units of length and can be found by counting or measuring units

Know that the angles at a point sum to 360 degrees and use this to solve problems

Know that the angles in a full turn sum to 360 degrees and use this to solve problems

Know that the angles on a straight line sum to 180 degrees and use this to solve problems

Know that the perimeter is the distance around a 2D shape

Know that the perimeter of a rectangle can be calculated by addition and multiplication

Know that unknown side lengths can be calculated from the perimeter and known side lengths

Know the number of days in each month, year and leap year

Make and draw quadrilaterals on circular geoboards

Make and draw shapes with and without parallel and perpendicular sides

Make and draw triangles on circular geoboards

Make different sized angles by rotating two lines around a fixed point

Make efficient use of subtraction strategies including column subtraction