What you need to know
Check yourself against these “I can” statements.
- I can estimate the area of a triangle by counting squares
- I can explain where the formula for the area of a triangle comes from
- I can use a formula to find the area of a triangle
- I can find the area of a parallelogram using a formula
- I can explain where the formula for the area of a trapezium comes from
Practise this topic
3 resourcesArea & Perimeter
Rectangles, squares, triangles, parallelograms, trapeziums and L-shapes, grouped by area. From Standard, a perimeter or an unhalved triangle matches another group.
🧮 ToolFormula Sheet
Make a printable formula sheet: tick the shapes you want (2D area, perimeter and arc length, volume, surface area, and sector, arc and segment in radians), the eight circle theorems with diagrams, the GCSE formulae sheet…
🧮 ToolShape Formulas
Animated visual proofs of the area, volume and surface area formulae: drag the bar (or press Play) to turn each shape step by step into one whose area or volume we already know, with a caption for each step and the formula built…
These are the pages for Triangles, Parallelograms and Trapeziums in the Year 7 scheme of work, following Pearson Edexcel Maths Progress Delta 1. Open this topic in Mr Wells Maths to see it alongside the rest of the course.