Question

the perimeter of isosceles triangle is 14cm and the ratio of lateral side to base is 5:4. find area of triangle

Answer 1

5x+5x+4x=14

14x=14

x=1

the sides of triangle are 5,5,4

area=√p(p-a)(p-b)(p-c)

       =√7(7-5)(7-5)(7-4)
       =√12×7

       =√84
     =9.17

Answer 2

let the side of triangle be 5x,5x ,4x the 
give that perimeter is 14
this employs
5x+5x+4x=14
14x=14
x=14/14
x=1
area=√p(p-a)(p-b)(p-c)

       =√7(7-5)(7-5)(7-4)
       =√12×7

       =√84
     =9.17