Classifying shapes by line properties
Mathematics · Geometry · procedural
Classify two-dimensional figures based on the presence or absence of parallel or perpendicular lines, or angles of a specified size; recognise right triangles as a category
What mastery looks like
- Sort a set of quadrilaterals into those with parallel sides and those without
- Identify which triangles in a set are right triangles
- Classify shapes that have both perpendicular and parallel sides
Check your understanding
If you show Classifying shapes by line properties a mixed set of triangles and quadrilaterals, can they sort them into groups — like "shapes with at least one right angle" or "shapes with parallel sides" — and explain their reasoning?
Prerequisites
Required first