A pentagon has its sides in A.P. If perimeter of pentagon is 80 then find sum of largest & smallest side of pentagon.
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Sum of angles of petagon,Sn=80
let smallest side = x
sides form A.P
n=5, because of pentagon
Sn=(n/2)[2a +(n-1)d]
80=(5/2)[2x+4d]
32=2(x+2d)
16=x+2d
x=16-2d
DEAR WE NEED COMMON DIFFRENCE ALSO TO SOLVE THIS QUESTION
let smallest side = x
sides form A.P
n=5, because of pentagon
Sn=(n/2)[2a +(n-1)d]
80=(5/2)[2x+4d]
32=2(x+2d)
16=x+2d
x=16-2d
DEAR WE NEED COMMON DIFFRENCE ALSO TO SOLVE THIS QUESTION
sagarika2308:
No, without common difference also, we can solve the question !!!
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