# Find the area of triangle whose perimeter is 22cm , one side is 9cm and difference of the other two sides is 3cm

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x+y+z=22

x=9

y-z=3...y=3+z

Therefore, 9+3+z+z=22

2z=10

z=5

Therefore, y=8,

Now you have got all the three sides, area can be easily calculated using herons formula.

so 2n+12=22

n=5

so one side is 5cm and other side is 8

so now use herons formulas.

root s(s-9)(s-5)(s-8)= ANSWER

s= semi perimeter of the triangle