Category: geometry



  1. 3D geometry
  2. 3D shapes
  3. Alternate segment theorem
  4. Angle at the centre of a circle is twice the angle at the circumference
  5. Angle in a semicircle is 90°
  6. Angles in the same segment of a circle are equal
  7. Area and circumference of circles
  8. Area and perimeter
  9. Area and perimeter of quadrilaterals
  10. Area and perimeter of triangles
  11. Circle geometry
  12. Congruent and similar shapes
  13. Congruent shapes
  14. Congruent triangles
  15. Cube
  16. Cube surface area and net
  17. Decagons - polygons with 10 sides
  18. Dodecagons - polygons with 12 sides
  19. Geometry
  20. Geometry basic rules
  21. Hendecagons - polygons with 11 sides
  22. Heptagons - polygons with 7 sides
  23. Hexagons - polygons with 6 sides
  24. Interior and exterior angles of a polygon
  25. Line symmetry
  26. Loci
  27. Locus of points a fixed distance from a given line
  28. Locus of points a fixed distance from a given point
  29. Locus of points an equal distance between 2 lines
  30. Locus of points an equal distance between 2 points
  31. More quadrilaterals
  32. Nonagons - polygons with 9 sides
  33. Octagons - polygons with 8 sides
  34. Opposite angles in a cyclic quadrilateral add up to 180°
  35. Other types of polygon
  36. Parallel lines
  37. Parts of a circle
  38. Pentagons - polygons with 5 sides
  39. Perpendicular bisector of chord theorem
  40. Polygons
  41. Quadrilateral family tree
  42. Quadrilaterals
  43. Regular polygons
  44. Regular tessellations
  45. Rotational symmetry
  46. Similar shapes
  47. Similar triangles
  48. Similar triangles proof
  49. Star polygons
  50. Tangent and radius of a circle meet at 90°
  51. Tessellations and symmetry
  52. Transformations
  53. Translation
  54. Triangles
  55. Two radii form an isosceles triangle
  56. Two tangents from a point have equal length
  57. n-gons - polygons with any number of sides


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