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two sides of a triangle are 11 centemeter and 9 centemeter.if the perimeter of the triangle is 25 centemeter,what is the length of the third side of the triangle?

Sagot :

for the perimeter of the triangle, add all sides 
given that a, b, c are the sides of the triangle and p as perimeter 
the equation is as follows"
p= a+b+c

therefore, given the sides and perimeter:
25= 11+9+x,
solve for x, youll get:

5cm