1Explain the difference between perimeter and area, and how the units help you keep them apart.
2Show how the formula for the area of a triangle follows from the area of a rectangle.
3Why is the perpendicular height used in area formulas rather than the sloping side?
4Two rectangular plots each need 24 m of fencing, but one is 11 m by 1 m and the other is 6 m by 6 m. Compare them and explain the general rule.
5How do you find the area and perimeter of an L-shaped room, and what is the common mistake with the perimeter?