Establish the formulas for areas of rectangles, triangles and parallelograms and use these in problem solving (VCMMG258)
LO: To find the formula for the area of rectangles, triangles and parallelograms.
Know:

the dimensions of 2D shapes such as length and width (height)

the properties of rectangles, triangles and parallelograms.
Understand:

That formulas can be used to quickly find the area of a rectangle, triangle or parallelogram.
Do:

I can find and use the formula for the area of rectangles, triangles and parallelogram to solve problems involving the areas of surfaces.
Elaborations:

building on the understanding of the area of rectangles to develop formulas for the area of triangles

establishing that the area of a triangle is half the area of an appropriate rectangle

using area formulas for rectangles and triangles to solve problems involving areas of surfaces

constructing different rectangles for a given area (cm2 or m2) in order to demonstrate that many different rectangles may have the same area.

Design and construct different rectangles, given either perimeter or area, or both (whole numbers), and make generalizations.