#MeasurementAndSpace >[!info]- [Geometric measure A | NSW Curriculum Website](https://curriculum.nsw.edu.au/learning-areas/mathematics/mathematics-k-10-2022/content/stage-3/fa35c41b81) MA3-GM-01 locates and describes points on a coordinate plane MA3-GM-02 selects and uses the appropriate unit and device to measure lengths and distances including perimeters MA3-GM-03 measures and constructs angles, and identifies the relationships between angles on a straight line and angles at a point >[!abstract]- Prior Knowledge >- Geometric Measure (Stage 2) ## Position: Explore the Cartesian coordinate system - Recognise that the grid-map reference system gives the area of a location and the number plane identifies a specific point - Identify that in the coordinate system the lines are numbered, not the spaces - Identify the point of intersection of the 2 axes as the origin, having coordinates (0, 0) - Plot and label points, given coordinates, on the number plane in the first quadrant, describing the horizontal position first, followed by the vertical position - Identify and record the coordinates of given points on the number plane in the first quadrant ## Length: Use metres and kilometres for length and distances - Recognise the need for a formal unit longer than the metre for measuring distance - Measure 100 metres and recognise that 10 times 100 metres is one kilometre, ie 1000 metres = 1 kilometre - Estimate lengths and distances using an appropriate unit - Record distances using the abbreviation for kilometres (km) - Use a variety of measuring devices to measure lengths and distances in different contexts ## Length: Measure lengths to find perimeters - Use efficient strategies to calculate the perimeter of a large rectangular area in metres - Calculate perimeters of common two-dimensional shapes, including squares, rectangles and triangles - Determine which side lengths are needed to find the perimeter of a shape (Reasons about relations) - Recognise that rectangles with the same perimeter may have different dimensions (Spatial reasoning) ## Angles: Estimate, measure and compare angles using degrees - Identify the arms and vertex of an angle where both arms are invisible, such as for rotations - Explain how a protractor is formed and used to measure an angle - Estimate and describe the size of angles using known angles as benchmarks (Reasons about mental rotation) - Record angle measurements using the symbol for degrees (°) - Measure angles of up to 360° using a protractor ## Angles: Use a protractor to measure and identify types of angles - Create angles of up to 360° using a protractor - Recognise that a right angle is 90°, a straight angle is 180° and an angle of revolution is 360° - Identify and describe angle size in degrees for the classifications acute, obtuse and reflex