Question

Find the mean of the number of sides of
the following polygons. a triangle , a quadrilateral,
an octagon , a heptagon and a
pentagon​

Answer 1

Explanation:

A geometrical figure with three or more sides is called a polygon or a polyhedron. Here are the names for some polygons.

3 triangle, trigon

4 quadrilateral, tetragon

5 pentagon

6 hexagon

7 heptagon

8 octagon

9 nonagon, enneagon

10 decagon

11 hendecagon

12 dodecagon, duodecagon

13 triskaidecagon, tridecagon

14 tetrakaidecagon, tetradecagon

15 pentadecagon

16 hexadecagon

17 heptadecagon

18 octadecagon

19 enneadecagon

20 icosagon

How Many Angles?

A polygon has as many angles as it has sides. For example, a triangle has 3 sides and 3 angles. A pentagon has 5 sides and 5 angles. An octadecagon has 18 sides and 18 angles!