Problema Solution
an isosceles triangle with sides 7,7, and 12.
Answer provided by our tutors
Area = sqrt(s*(s-a)*(s-b)*(s-c)) where s=(a+b+c)/2 is the semi-perimeter.
here
a=7:b=7 and c=12
s = (7+7+12)/2 = 26
now area = srq(26*(29-7)*(26-7)*(29-12)) = 429.83