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What is 2-D? We average two-dimensional. Aaaand... What is that? A 2-D object is things with no depth. The closestly you will ever involved seeing one is a record cutout the a shape. However even that paper has a very little thickness, so that is important 3-D. Girlfriend might also hear the word polygon. That"s one more name for a 2D object. We"re going to give you a little overview that the polygons you may see in her math travels. Triangles
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A triangle is the generic name for a form with three (3) sides. There are different varieties of triangles. You can hear around an it is provided triangle. That is a triangle through all three of its political parties at equal lengths. Another type is one isosceles triangle. The a triangle with two (2) sides of same length and the 3rd side is different. Quadrilaterals and also Squares
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A quadrilateral is a shape with 4 (4) sides. You might hear about squares, rectangles, a rhombus, or a trapezoid. These room all different types of quadrilaterals. Squares have all sides through equal lengths and right angle (90 degree angles). A rhombus is really close to a square, little bit it"s at a tilt so the there space no right angles. It is favor a diamond top top its side. Pentagons and Hexagons
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Moving up in the variety of sides we find pentagons with five (5) sides. Next in the variety of sides, we find hexagons. Hexagons have actually six (6) sides. Girlfriend can include even much more sides to polygons. There is no limit. We"re additionally doing something various with this pics. Girlfriend should recognize that a polygon can be any kind of shape, also all bent and funny. If all of your sides have actually equal lengths, you are a constant polygon. Ellipses and Circles
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What happens if friend only have actually one side? Is the possible? type of. Ellipses room circular forms that could be circles or ovals. The border goes every the means around and also there space no corners. Girlfriend could also think about it together a polygon v an boundless amount that sides the all blend together. Various other Shapes
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You will uncover other types of shapes in the math world. Cardioids are favor circles v a dimple top top one side. A great example of a cardioid is a heart shape. Friend will additionally find stars. Typical star forms are the five-pointed kind. Stars are developed by connecting the corners of forms with more than four sides. The perform goes on, yet not ~ above this page.

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Two-Dimensional shape Name Quiz- pat Activity
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Two-Dimensional form Memory Challenge- beat Activity

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Useful referral MaterialsWikipedia:https://en.wikipedia.org/wiki/Pre-algebraEncyclopædia Britannica:http://www.britannica.com/topic/mathematicsCollege that the Redwoods:http://mathrev.redwoods.edu/PreAlgText/


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