#MeasurementAndSpace >[!info]- [Two-dimensional spatial structure B | NSW Curriculum Website](https://curriculum.nsw.edu.au/learning-areas/mathematics/mathematics-k-10-2022/content/stage-3/fa0dfe5fec) >- 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 >[!abstract]- Prior Knowledge >- [[Two-dimensional Spatial Structure A]] ## 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