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Q.

A polygon having 10 sides is called?


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a

Octagon

b

Decagon

c

Dodecagon

d

None of these

answer is B.

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Detailed Solution

Concept- The problem given  is related to the shape and its name. Remember the names of the different polygons and the number of sides around them.
A polygon is a two-dimensional closed figure composed of straight lines. Triangles, squares, pentagons and hexagons are all examples of polygons. The name indicates the number of sides of the shape. For example, a triangle has three sides and a rectangle has four sides. A shape that can be drawn by connecting three straight lines is called a triangle, and a shape that can be drawn by connecting four straight lines is called a quadrilateral.  Polygons with  equal side lengths are called regular polygons. Example: All sides of a square are equal. Therefore, it is a regular polygon.

Shape

Number of sides

Triangle

3

Quadrilateral

4

Pentagon

5

Hexagon

6

Heptagon

7

Octagon

8

Nonagon

9

Decagon

10

Undecagon

11

Dodecagon

12

 Hence, the correct answer is option 2) .
 
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