- MA3-2DS-01 investigates and classifies two-dimensional shapes, including triangles and quadrilaterals based on their properties
- MA3-2DS-02 selects and uses the appropriate unit to calculate areas, including areas of rectangles
- MA3-2DS-03 combines, splits and rearranges shapes to determine the area of parallelograms and triangles
Prior Knowledge
2D shapes: Dissect two-dimensional shapes and rearrange them using translations, reflections and rotations
- Use the terms translate, reflect and rotate to describe transformations of two-dimensional shapes
- Dissect and rearrange one shape to make another
- Recognise that translations, reflections or rotations change the position and orientation but not the size of shapes (Reasons about spatial orientation)
Area: Find the area of composite figures
- Find different ways to calculate the area of a composite L-shape figure
Area: Calculate the area of a parallelogram using subdivision and rearrangement
- Show how to transform a parallelogram into a rectangle to find its area
- Record, using words, a method for finding the area of any parallelogram
Area: Determine the area of a triangle
- Investigate the area of a triangle by comparing it to the area of a parallelogram with the same base length and height
- Establish the relationship between the area of a triangle and the area of a parallelogram formed by duplicating and rotating the triangle
- Record, using words, a method for finding the area of any triangle