NCERT Class 8 Mathematics Solutions: Chapter 3 –Understanding Quadrilaterals Exercise 3.1 Part 4
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Question: 4 Examine the table. (Each figure is divided into triangles and the sum of the angles deduced from that.)
Figure | Image | Image | Image | Image |
Side | 3 | 4 | 5 | 6 |
Angle Sum |
What can you say about the angle sum of a convex polygon with number of sides?
(a) 7 (b) 8 (c) 10 (d) n
Answer:
The angle sum of a polygon having side
(a) Given the number of sides 7
When , then
Angle sum of a polygon
(b) Given the number of sides 8
When , then
Angle sum of an octagon
(c) Given the number of sides 10
When , then
Angle sum of a Decagon
(d) Given the number of sides n
When, then
Angle sum of a polygon