GCSE Maths (Edexcel)

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Geometry and measures Properties and constructions

Angles on a Line

1:32 apply the properties of angles at a point, angles at a point on a straight line, vertically opposite angles; understand and use alternate and corresponding angles on parallel lines; derive and use the sum of angles in a triangle (e.g. to deduce and use the angle sum in any polygon, and to derive properties of regular polygons)
Spec G3
Previous Angles Around a Point Next Vertically Opposite Angles
  • There are 180 degrees on a straight line
  • To calculate a missing angle on a straight line, add together the given angles and subtract the sum from 180 degrees
  • In the example given, the missing angle is 80 degrees

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372

questions for Geometry and measures

164

questions for Properties and constructions