CAIE IGCSE Mathematics Extended Parallel-Line Angle Problems

Practise identifying corresponding, alternate and co-interior angles in parallel-line diagrams and using the correct relationship with reasons.

Syllabus
2028–2030
Objective
E4.6.2
Level
Extended

Exam points

  • identify corresponding angles in matching corners and set their measures equal
  • identify alternate interior angles on opposite sides of a transversal and set them equal
  • use co-interior angles on the same side of a transversal as supplementary to 180°

E4.6.2 Calculate unknown angles and give geometric explanations for angles question 1

[Maximum number: 3]
NOT TO SCALE

NOT TO SCALE

The diagram shows two straight lines intersecting two parallel lines.
Find the values of a, b and c.
a=b=c=\begin{aligned}a&=\\b&=\\c&=\end{aligned}

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