Asit Das Gupta and Alok Kumar Solutions for Exercise 2: Revision Exercise 4

Find the sum of the interior angles of a polygon of $\left(i\right) 15$ sides $\left(ii\right) 20$ sides.

The sum of the interior angles of a polygon is $3600°$. Find the number of sides of the polygon.

Two angles of a hexagon measures $80°$ and $90°$. Other angles of the hexagon are in the ratio $4 : 6 : 5 : 7.$ Find the angles.

Find the measure of each interior angle of a regular $\left(i\right)$ nonagon $\left(ii\right)$polygon of 30 sides.

Find the value of $x$ in each of the following figures.

Find the value of $x$ in each of the following figures.

Find the value of $x$ in each of the following figures.

Find the value of $x$ in each of the following figures.