Investigate different ways of decomposing a polygon
I can decompose a polygon in different ways and identify properties of polygons.
Investigate different ways of decomposing a polygon
I can decompose a polygon in different ways and identify properties of polygons.
These resources will be removed by end of Summer Term 2025.
Lesson details
Key learning points
- The same whole can be split into different parts.
- Lines are perpendicular when they are at right angles to each other.
- Lines are parallel because they are always the same distance apart.
Keywords
Polygon - A polygon is a 2D shape made up of three or more straight lines.
Quadrilateral - A quadrilateral is a polygon that has four straight sides and four vertices.
Parallel - Parallel lines are straight lines that are always the same distance apart. They never get closer together or further apart.
Decompose - To decompose means to break something into parts that are the same as the original when you put them back together.
Common misconception
Pupils are not able to identify right angles and therefore struggle to identify pairs of perpendicular sides.
Provide children with a right angle checker. Take time to model its use, focusing on aligning one edge of the checker with a side of the angle they want to check.
Licence
This content is © Oak National Academy Limited (2024), licensed on Open Government Licence version 3.0 except where otherwise stated. See Oak's terms & conditions (Collection 2).
Lesson video
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Starter quiz
6 Questions
pentagon
octagon
quadrilateral
triangle
is a triangle.
is a pentagon.
is a hexagon.
is an octagon.
Exit quiz
6 Questions
triangle
triangle
quadrilatral
has one pair of parallel sides.
has only two right angles.
has more than one pair of perpendicular sides.