Dont no...not nuf info
Yu kan draw different shapes with rim length=65
zampel: equalateral triangel, all sides same leng=65/3=21.666
base=21.666
hite=side*sine(60 deg)=0.866
area=base*hite/2=side*side*0.866/2=0.433*side*side=203.26
AREA=203.26
------- but if make 45 deg rite triangel (isosoles triangel)
side lengths hav raesheo av 1:1:root(2) which add up tu 3.4142
so base=(1/3.4142)*65=19.038
hite=base=19.038
area=(1/2)hite*bse=19.038*19.038/2=181.225
AREA=181.225