Angles on parallel lines traversed by a straight line
I can use facts about a pair of parallel lines traversed by a straight line.
Angles on parallel lines traversed by a straight line
I can use facts about a pair of parallel lines traversed by a straight line.
These resources will be removed by end of Summer Term 2025.
Lesson details
Key learning points
- Alternate, corresponding and co-interior angles can be identified in diagrams containing pairs of parallel lines.
- Facts about angles in parallel lines can be used to find unknown angles.
- Facts about angles in parallel lines can be used in succession to find multiple unknown angles.
Keywords
Parallel - Two lines are parallel if they are straight lines that are always the same (non-zero) distance apart.
Alternate angles - a pair of angles both between or both outside two line segments that are on opposite sides of the transversal that cuts them.
Corresponding angles - Corresponding angles are a pair of angles at different vertices on the same side of a transversal in equivalent positions.
Co-interior angles - o-interior angles are on the same side of the transversal line and in between the two other lines.
Vertically opposite angles - Vertical angles are pairs of opposite angles formed when two lines intersect at a point. They are equal.
Common misconception
Pupils may struggle with the justifications rather than getting to the answer.
Keep asking pupils "why?" and encourage them to ask themselves, whenever they are working out an angle.
To help you plan your year 8 maths lesson on: Angles on parallel lines traversed by a straight line, download all teaching resources for free and adapt to suit your pupils' needs...
To help you plan your year 8 maths lesson on: Angles on parallel lines traversed by a straight line, download all teaching resources for free and adapt to suit your pupils' needs.
The starter quiz will activate and check your pupils' prior knowledge, with versions available both with and without answers in PDF format.
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The assessment exit quiz will test your pupils' understanding of the key learning points.
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Explore more key stage 3 maths lessons from the Geometrical properties: polygons unit, dive into the full secondary maths curriculum, or learn more about lesson planning.
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Lesson video
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Starter quiz
6 Questions
Exit quiz
6 Questions
