![]() two collections have the same quantity by matching items one. Square A square is a 2-dimensional 4 sided polygon. Use direct comparison to sort three dimensional objects and two dimensional shapes (VCMMG064). A rectangle have 4 sides, 4 angles and 4 vertices. They estimate angles, and use protractors and digital technology to construct and measure angles. To rotate an object there needs to be a fixed point, where each vertex of the image is rotated according to the number of degrees specified. Rectangle A rectangle is a 2-dimensional 4 sided polygon. Rotational symmetry can be explored using familiar 2-dimensional shapes, letters or numbers. Regular decagons have sides of equal length and interior angles of 144 degrees.Īn pentadecagon is a 15 sided polygon with interior angles that add to 2340 degrees.Īn icosagon is a 20 sided polygon with interior angles that add to 3240 degrees. 2D Shapes Names and Properties Definition and Properties 2-dimensional shapes have 2 dimensions length and width. Regular nonagons have sides of equal length and interior angles of 140 degrees.Ī decagon is a 10 sided polygon with interior angles that add to 1440 degrees. Regular octagons have sides of equal length and interior angles of 135 degrees.Ī nonagon is a 9 sided polygon with interior angles that add to 1260 degrees. two-dimensional shapes and three-dimensional objects in the environment. The British 50 and 20 pence coins are curved heptagons.Īn octagon is an 8 sided polygon with interior angles that add to 1080 degrees. Regular heptagons have sides of equal length and interior angles of 128.57 degrees. Congruent triangles have three pairs of congruent sides and three pairs of congruent angles. Regular hexagons have sides of equal length and interior angles of 120 degrees.Ī heptagon is a 7 sided polygon with interior angles that add to 900 degrees. If all sides and interior angles of a nonagon are all equal, then it is a regular. The edible plant okra is shaped like a pentagon.Ī hexagon is a 6 sided polygon with interior angles that add to 720 degrees. A nonagon is a 9-sided polygon where the sum of the interior angle is 1260. ![]() The US Department of Defense headquarters is named 'the Pentagon'. Regular pentagons have sides of equal length and interior angles of 108 degrees. Angles these are formed by the intersection of the segments/sides of a triangle. Sides - these are segments that make up the triangle. A square is also a type of quadrilateral.Ī pentagon is a 5 sided polygon with interior angles that add to 540 degrees. Classifying 2-Dimensional Shapes Triangles A triangle is a three-sided 2-dimensional shape that has the following parts: Vertices these are the corners or the points where the sides meet. Examples of regular polygons include the equilateral triangle and square.Ī triangle is a 3 sided polygon with interior angles that add to 180 degrees.Ī square is a 4 sided polygon with interior angles that add to 360 degrees. Today's information on 2D polygon shapes comes to us from KidsMathGamesOnline (with some help from Google images!)Ī polygon is a plane (2 dimensional) figure that features at least 3 straight sides and angles.Ī regular polygon has sides which are all the same length as well as angles which are all the same. ![]()
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