First, students will learn how to find the area of triangles and quadrilaterals on grids.
Watch these Khan Academy videos:
Areas of shapes on grids by Khan Academy
Next, students will learn how to derive the formula for the area of a triangle on a grid.
Area of triangle formula derivation by Khan Academy
Conclude by giving your students these challenges:
- Make 37 by NRICH
- A Chance to Win? by NRICH
- Tri-colour by NRICH
- Christmas Trees by NRICH