![]() It shows a list of 2d shapes.Ģ-D shapes are flat and can be drawn on a sheet of paper. Observe the following figure which shows the difference between regular and irregular two dimensional shapes. A two dimensional shape (2D shape) is irregular if all the sides are of unequal length and all its angles are of unequal measures.A 2 dimensional shape (2D shape) is said to be regular if all its sides are equal in length and all its interior angles measure the same.Types of 2D Shapes - Regular and Irregular 2D ShapesĪ 2D shape can be classified as regular or irregular based on the length and the interior angles: The figure given below shows a list of 2D shapes that we commonly come across. 2D shapes with at least three straight sides are called polygons and these include triangles, squares, and quadrilaterals. All the 2 dimensional shapes have sides, vertices (corners), and interior angles, except for the circle, which is a curved figure. A circle, square, rectangle, and triangle are some examples of two-dimensional shapes and these shapes can be drawn on paper. 2D Shapes DefinitionĪ polygon is a 2 dimensional shape made up of straight line segments which are connected with each other, thus giving it a closed shape. Some common 3D shapes are cuboids, cones, pyramids, and cylinders. For example, a dice is three-dimensional because it consists of a length, a width, and a height. In comparison to these, a 3D (three-dimensional) shape has three dimensions - length, width, and height. They do not have any thickness and can be measured only by the two dimensions. Polygon: A polygon is a 2D shape with straight sides.In geometry, 2D shapes (2 dimensional shapes) can be defined as plane figures that are completely flat and have only two dimensions - length and width. Kite: A quadrilateral with two pairs of sides that are same length. One pair of diagonally opposite sides is equal. Parallelogram: A quadrilateral with both pairs of opposite sides parallel and both pairs an equal length. Trapezium: A quadrilateral with one pair of parallel sides. (Differs from a square in that angles are NOT 90˚). Rhombus: A quadrilateral with both pairs or opposite sides parallel and all sides equal length. Right-angled triangle: A triangle that has a right angle. Scalene triangle: A triangle with 3 sides that are all unequal. Isosceles triangle: A triangle with 2 equal sides. illustrate and name parts of circles, including radius, diameter and circumference, and know that diameter is twice the radiusĮquilateral triangle: A triangle with 3 equal sides and 3 equal angles.find unknown angles in triangles, quadrilaterals and regular polygons. ![]()
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