A polygon is a closed plane figure bounded through a finite variety of line segments. Really often us are involved with straightforward polygons, whereby the border does no cross itself.
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Polygons room usually named according come the variety of sides lock possess. Because that example, a three-sided polygon is a triangle, four-sided a quadrilateral, five-sided a pentagon. You have the right to download the naming polygons: information sheet.
Polygons room either convex or non-convex. In a convex polygon all of the angles are less than 180 degrees. A non-convex polygon must have actually at the very least one inner angle better than 180 degrees. This is called a reflex angle. You have the right to download a Convex and non-convex polygons: details sheet.
Polygons space either regular or irregular. Consistent polygons have actually all sides and all angles equal. You deserve to download a Regular and irregular polygons: details sheet.
Triangles space classified follow to their sides and their angles. The triangle below is called an obtuse-angled scalene triangle because one angle is greater than 90° (obtuse) and also its political parties are different lengths (scalene). You deserve to download the Classifying triangles: details sheet.
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Quadrilaterals are classified using their properties. There are six special quadrilaterals figured out in the Australian Curriculum: squares, rectangles, parallelograms, rhombuses, trapeziums and also kites. You can download a unique quadrilaterals: details sheet. You can additionally download the properties of quadrilaterals: information sheets mirroring the properties because that each the the six quadrilaterals.
Foundation: Sort, describe and name familiar two dimensional shapes and also three dimensional objects in the environment
Year 1: Recognise and classify familiar two dimensional shapes and also three dimensional objects using evident features
Year 5: explain translations, reflections and also rotations of 2 dimensional shapes. Determine line and also rotational symmetries