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.
You are watching: Is a polygon a plane figure
Polygons room usually named according come the variety of sides lock possess. Because that example, a threesided polygon is a triangle, foursided a quadrilateral, fivesided a pentagon. You have the right to download the naming polygons: information sheet.
Polygons room either convex or nonconvex. In a convex polygon all of the angles are less than 180 degrees. A nonconvex 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 nonconvex 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 obtuseangled 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.
See more: Br A Printed Almanac Is An Example Of What Kind Of Resource?
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