Students learn how to find the perimeter and area of various 2D shapes including triangles, quadrilaterals, compound shapes and circles. Throughout the topic links are made to algebraic reasoning and estimation. This topic takes place in Term 4 of Year 9 and links to arc length and area of sectors later on.
know and apply formulae to calculate:
calculate the perimeters of 2D shapes, including composite shapes;
In this lesson, we learn about the length and volume scale factor of 3D shapes and the relationship between them.
Calculating best buys using ratio.
How to solve simultaneous equations using the substitution method.