Find the number of sides of polygon if...? All the angle of a polygon are either 155^o or 140^o. There are twice as many angles of 155^o as 140^o.
1 Answer
May 26, 2017
Explanation:
The external angles of the polygon are each
So the external angles are a mixture of:
180^@-155^@ = 25^@
180^@-140^@ = 40^@
with twice as many
We can deduce that the number of angles and sides is a multiple of
2*25^@+40^@ = 90^@
external angles.
The external angles of the polygon add up to