CAIE IGCSE Mathematics Parallel-Line Angle Problems

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

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°

[Maximum number: 3]

NOT TO SCALE

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

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