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Broad Topics > 2D Geometry, Shape and Space

TopicResources availableShape, space & measures - generally52Angles36Angles at a point/on a line11Angle properties of shapes36Compass directions and bearings1Perpendicular lines19Parallel lines12Congruent triangles3Isosceles triangles22Equilateral triangles26Right angled triangles26Mixed triangles63Similar triangles16Triangle theorems2Quadrilaterals41Squares73Rectangles27Parallelograms8Bisection2Trapezia7Rhombi9Pentagons12Hexagons8Octagons4Other polygons17Regular polygons27Inscribed circle4Inscribed polygons11Ruler & protractor constructions6Straight edge & compass constructions23Circles93Radius (radii) & diameters20Tangents13Chords and segments2Circle theorems36Cyclic9Pythagoras' theorem93Pythagorean triples19Locus/loci in 2D13
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The NRICH Project aims to enrich the mathematical experiences of all learners. To support this aim, members of the NRICH team work in a wide range of capacities, including providing professional development for teachers wishing to embed rich mathematical tasks into everyday classroom practice. More information on many of our other activities can be found here.
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NRICH is part of the family of activities in the Millennium Mathematics Project.