Mathematics Class 6 NCERT Solutions: Chapter 5 Understanding Elementary Shapes Exercise 5.8 – Part 1

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Q.1 Examine whether the following are polygons. If anyone among these is not, say why?

(a)

Image of Elementary Shape

Image of Elementary Shape

Image of Elementary Shape

Answer: As it is not a closed figure, therefore, it is not a polygon.

(b)

Image of Polygon

Image of Polygon

Image of Polygon

Answer: It is a polygon because it is closed by line segments.

(c)

Image of Circle

Image of Circle

Image of Circle

Answer: It is not a polygon because it is not made by line segments.

(d)

Image of Triangle

Image of Triangle

Image of Triangle

Answer: It is not a polygon because it not made only by line segments, it has curved surface also.

Q.2 Name each polygon:

(a)

Image of Quadrilateral Polygon

Image of Quadrilateral Polygon

Image of Quadrilateral Polygon

Answer: Quadrilateral

(b)

Image of Triangle Polygon

Image of Triangle Polygon

Image of Triangle Polygon

Answer: Triangle

(c)

Image of Pentagon Polygon

Image of Pentagon Polygon

Image of Pentagon Polygon

Answer: Pentagon

(d)

Image of Octagon Polygon

Image of Octagon Polygon

Image of Octagon Polygon

Answer: Octagon