![]() ![]() A pentagon is said to be a concave pentagon if at least one of the vertex is pointing inwards.A convex pentagon is a pentagon where all fives vertices are pointing outwards.Every triangle has three sides, three vertices, and three angles. A triangle is formed when three straight lines meet. TriangleĪ triangle is a closed, two-dimensional shape with three straight sides. Let’s take a look at some of the polygons and define their characteristics. Some common types of polygons are triangle, square, rectangle, pentagon, hexagon, etc. The properties and kinds of polygons differ depending on the number of sides it has. All circles have 360 degrees of angle measure.The measure of a diameter is twice the measure of a radius. It is a line segment that runs across the circle through its center. The diameter of a circle is the longest possible line segment that can be drawn in a circle.The radius is the distance from the center of the circle to any point on the circumference.The circumference is equal to the length of the wire, which in this case, is 15 cm. Assume a string with a length of 15 cm, which is bent to form a circle. The distance around a circle can be defined as its circumference.The central point is the point located at the center of a circle.The parts of a circle are the central point, radius, diameter, and circumference. We can say that a 2-dimensional shape is a circle if it a closed, completely rounded shape. The image below shows how a regular 2D shape differs from an irregular 2D shape. If all of the sides of a 2D object are of unequal length and all angles are of unequal measure, it is considered irregular. ![]() If all of the sides of a 2D object have the same length and all interior angles are the same, it is said to be regular. When classifying a 2D shape, we need to consider the measure of the lengths of each side and its interior angles. We can classify a 2D shape as a regular and irregular shape. How can we classify a 2-dimensional geometric shape? Polygons are named and determined based on the number of sides, such as triangles, quadrilaterals, pentagon, hexagon, etc. It is made of line segments wherein each of which intersects with exactly two other line segments. PolygonĪ polygon is a closed and flat figure on a plane with straight sides. Thus, it does not meet the criteria for being a polygon. However, a circle is not a polygon, and will not be a polygon since a circle is formed by a single curved line and not from line segments. Students sometimes confuse a circle as a polygon. CircleĪ circle is a closed 2D shape whose points are always the same distance from the central point. We can classify a 2-dimensional shape depending on the number of sides, how it is formed, and by its lengths and widths. Or use the Facebook Comments form at the bottom of the page.What are the different types of 2-dimensional geometric shapes? We would be grateful for any feedback on our quizzes, please let us know using our Contact Us link, ![]() We also collect the results from the quizzes which we use to help us to develop our resources and give us insight into future resources to create.įor more information on the information we collect, please take a look at our Privacy Policy We do not collect any personal data from our quizzes, except in the 'First Name' and 'Group/Class' fields which are both optional and only used for teachers to identify students within their educational setting. You can print a copy of your results from this page, either as a pdf or as a paper copy.įor incorrect responses, we have added some helpful learning points to explain which answer was correct and why. This will take you to a new webpage where your results will be shown. Our quizzes have been created using Google Forms.Īt the end of the quiz, you will get the chance to see your results by clicking 'See Score'. an online quiz to help develop naming and identifying a range of 2D shapes.Worksheets and support for finding and naming the parts of a circle.A range of printable clipart for 2d shapes.Reasoning and exploring the properties of 2d shapes.knowing properties of angles of triangles and quadrilaterals.2d shapes worksheets - area and perimeter.investigate properties and features of 2d shapes.knowing and using properties of 2d shapes - sides, symmetry, right angles.identify simple properties of 2d shapes - sides, corners, right angles.identifying and sorting other 2d shapes.identify and name members of the triangle family, e.g.drawing shapes using positional language - inside, above, below.There are a range of geometry worksheets set out in different sections as follows: ![]()
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