Pass maths · Measures and geometry

Angle rules

Learn the method, then complete five focused questions.

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LZ Method

Angles on a line total 180°. Angles around a point total 360°. Triangle angles total 180°. Vertically opposite angles are equal. Corresponding and alternate angles are equal on parallel lines.

  1. 1Triangle angles: 48°, 67°, x
  2. 248 + 67 + x = 180
  3. 3x = 180 − 115 = 65°