Question

The first term of a convex polygon are in AP. The smallest angle is 120 degree and the common difference is 5 degree find the number of sides of the polygon

Answer 1

i used the approach that a polygon cannot have an angle 180 degree cause then the polygon will not close i took the last term as 175 degree and used the formula of ap answer is comming 12 but the answer in the testbook is given 9

Answer 2

@ganeshie8

Answer 3

@Kainui

Answer 4

@paki @ParthKohli

Answer 5

@mathslover

Answer 6

@hartnn

Answer 7

@ganeshie8

Answer 8

@Kainui

Answer 9

two ans are 16 and 9 u find wrong second one since T16=120+(16-1)*5=120+75=195 and angle are not more then 180 so ans is 9 is right.

Answer 10

@dan815