Answer:
Step-by-step explanation:
s = √( 4.2*4.2 + (s/2)(s/2) )
s = √( 4.2*4.2 + (s^2/4) )
s^2= 4.2*4.2 + (s^2/4)
s^2 - (s^2/4) = 4.2*4.2
(4s^2/4) - (s^2/4) = 4.2*4.2
(3s^2/4) = 4.2*4.2
(3/4)s^2 = 4.2*4.2
s^2= 4.2*4.2*(4/3)
s = √( 4.2*4.2*(4/3) )
s = 2*4.2 * √( 1/3 )
s = 4.84974226119
answer:
perimeter = 3 * 4.84974226119
perimeter = 14.5492267836 meters
