Question

the exterior angles of the polygons are 3y 4y and 5y.
what are the interior angles of the polygons also write the name of the polygon

Answer 1

Sum of all exterior angles =360
Therefore,3y+4y+5y=360
12y=360
y=360\12=30
Therefore,3y=3*30=90
4y=4*30=120
5y=5*30=150
Exterior angle+interior angle = 180
(Linear pair)
Therefore interior angles are 90,60 and 30.
The polygon is triangle as sum of all angles is 180 and no of angles is 3.

Answer 2

3y= 90°

4y=60°

5y= 30°

It is a triangle