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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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Presentation on theme: "► 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."— Presentation transcript:

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2 ► 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.

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

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

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

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

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8 ► 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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10 ► A scalene triangle has three sides with different lengths. Therefore, it has three different angles.

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

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

13 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.

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

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

22 What type of polygon is in these beehives?

23 What type of polygon do you see in this photo?

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