Category: gcse



  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. Circle inscribed in a 3-4-5 triangle puzzle
  13. Congruent and similar shapes
  14. Congruent shapes
  15. Congruent triangles
  16. Cosine rule
  17. Cube
  18. Cube surface area and net
  19. Decagons - polygons with 10 sides
  20. Distance between two points on a graph
  21. Dodecagons - polygons with 12 sides
  22. Einstein's proof of Pythagoras' theorem
  23. Finding sides and angles with sine, cosine and tangent
  24. GCSE
  25. GCSE measures
  26. Geometry
  27. Geometry basic rules
  28. Geometry problems
  29. Gradient of a line
  30. Graphs
  31. Graphs of sloping lines through the origin
  32. Hendecagons - polygons with 11 sides
  33. Heptagons - polygons with 7 sides
  34. Hexagons - 6-sided polygon - angles, symmetry and properties
  35. Horizontal, vertical and diagonal straight line graphs
  36. Interior and exterior angles of a polygon
  37. Line symmetry
  38. Loci
  39. Locus of points a fixed distance from a given line
  40. Locus of points a fixed distance from a given point
  41. Locus of points an equal distance between 2 lines
  42. Locus of points an equal distance between 2 points
  43. More quadrilaterals
  44. Nonagons - polygons with 9 sides
  45. Octagons - polygons with 8 sides
  46. Opposite angles in a cyclic quadrilateral add up to 180°
  47. Other types of polygon
  48. Parallel lines
  49. Parts of a circle
  50. Pentagons - polygons with 5 sides
  51. Perpendicular bisector of chord theorem
  52. Polygons
  53. Pythagoras
  54. Pythagoras' theorem
  55. Pythagoras' theorem proof
  56. Pythagorean triples
  57. Quadrilateral family tree
  58. Quadrilaterals
  59. Regular polygons
  60. Regular tessellations
  61. Rotational symmetry
  62. Similar shapes
  63. Similar triangles
  64. Similar triangles proof
  65. Sine rule
  66. Star polygons
  67. Straight line graphs
  68. Tangent and radius of a circle meet at 90°
  69. Tessellations and symmetry
  70. Transformations
  71. Translation
  72. Triangles
  73. Trigonometry
  74. Trigonometry and Pythagoras
  75. Two radii form an isosceles triangle
  76. Two tangents from a point have equal length
  77. Why are the trig functions called sine, cosine and tangent?
  78. n-gons - polygons with any number of sides

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