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Published byAbigayle Costain Modified about 1 year ago

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► Polygon : is a closed plane figure formed by three or more segments called sides. ► Vertex : is the point at which two sides of a polygon meet.

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► The figure below is not a polygon, since it is not a closed figure:

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► The figure below is not a polygon, since it is not made of line segments:

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► The figure below is not a polygon, since its sides do not intersect in exactly two places each:

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► There are two types of polygons: REGULAR AND IRREGULAR examples of regular polygons examples of irregular polygons

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► The sum of the angles of a triangle is 180 degrees. TRIANGLES Equilateral Triangle An equilateral triangle has three sides of equal length. This means that each angle is 60 degrees

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► A scalene triangle has three sides with different lengths. Therefore, it has three different angles.

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► Acute Triangle : An acute triangle has three acute angles.

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Obtuse Triangle ► An obtuse triangle has an obtuse angle, in which one of the angles is more than 90 degrees.

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Right Triangle A right triangle has a right angle, in which one of the angles is 90 degrees. A right triangle has a right angle, in which one of the angles is 90 degrees.

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► A quadrilateral is a four-sided polygon in which the sum of all the angles is 360 º

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What type of polygon is on the sides of these pyramids?

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What type of polygon is in these beehives?

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What type of polygon do you see in this photo?

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