GCSE Maths (AQA)

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Geometry and measures Properties and constructions

Vertically Opposite Angles

2:50 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 (eg to deduce and use the angle sum in any polygon, and to derive properties of regular polygons)
Spec G3
Previous Angles on a Line Next Equilateral, Isosceles & Scalene Triangles
  • Vertically opposite angles are angles that are opposite each other when two lines intersect
  • Vertically opposite angles are equal in measure
  • The sum of vertically opposite angles is 180 degrees
  • Vertically opposite angles can be used to find missing angles in a straight line
  • In the given example, angle x is equal to 30 degrees and angle y is equal to 150 degrees

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372

questions for Geometry and measures

164

questions for Properties and constructions