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Published byWilliam Edmund Jefferson Modified over 9 years ago
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POLYGONS 2D SHAPES
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A Polygon is a closed figure made by joining line segments. Which of the following figures is a polygon? A B C Why?
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The answer is B Because it’s a close figure and all the sides are line segments. sides
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In a regular polygon the sides are all the same length and the angles are all the same. Which of the following polygons is a regular one? A B C Why?
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The answer is C Because all the sides and angles are the same size.
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Vertex: is the point where two sides of a polygon intersect. (Corners) Angle is the space between two sides Vertex
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Types of angles obtuse angle acute angle right angle The FULL CIRCLE forms a 360 degree angle
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Triangle: is a three-sided polygon. The sum of the angles of a triangle is 180 degrees
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Equilateral triangle All the sides are the same length and all the angles are equal.
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Isosceles triangle Two sides are the same length and two angles are equal
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Scalene triangle All the sides and angles are differents.
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Quadrilateral: a four-sided polygon. The sum of the angles of a quadrilateral is 360 degrees
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Four-sided polygon having all right angles RectangleSquare What is the difference?
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Pentagon : five-sided polygon Regular pentagon All five sides are the same length and all five angles are equal.
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