Ontario · Grade 8
G8.E2.3
Grade 8 — Solve problems involving the perimeter, circumference, area, volume and surface area of composite shapes and objects.
Grade 8 — Solve problems involving the volume and surface area of composite objects.
The 2 skills that cover it
What a student should be able to do
- Find the perimeter and area of rectangles and triangles.
- Use the area formulas for parallelograms and trapezoids.
- Decompose a composite figure to find its area.
- Work backwards from an area to a missing side length.
- Find the volume of a prism and a cylinder.
- Find the surface area of a prism and a cylinder using nets.
- Apply the one-third factor for pyramids and cones.
- Use volume in capacity and packing word problems.