MathematicsGeometryAges 9–10
Understanding angles (age 9+)
Use the properties of rectangles to deduce related facts and find missing lengths and angles
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If your child knows one side of a rectangular garden is 7 m, can they tell you the length of the opposite side and all four corner angles — without measuring?
Use the properties of rectangles to deduce related facts and find missing lengths and angles
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Check understanding
- Given one side of a rectangle is 8 cm and the perimeter is 28 cm, find the other side
- Explain that all angles in a rectangle are 90°
- Find a missing side of a rectangle given its area and one side length
“If your child knows one side of a rectangular garden is 7 m, can they tell you the length of the opposite side and all four corner angles — without measuring?”
Curriculum record
- Type
- Procedural
- Subject
- Mathematics
- Domain
- Geometry
- Age range
- Ages 9–10