Mathematics
Measurement
Procedural
9–10 yrs
Perimeter of Compound Shapes
复合图形的周长
Description
Measure and calculate the perimeter of composite rectilinear shapes in centimetres and metres
Mastery Evidence
- Find the perimeter of an L-shaped figure by identifying all side lengths
- Calculate the perimeter of a composite shape where some sides must be deduced
- Draw a composite rectilinear shape with a perimeter of 40 cm
Assessment Prompt
If your child is given an L-shaped garden plan with all the side measurements labelled, can they add all the sides together to find the total perimeter?
Prerequisites 2
Area of compound shapes
分解直角多边形有助于求周长时找出缺失的边长
Perimeters of polygons
四年级多边形周长是复合直角图形周长的先修内容
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