Question

2 sides of a triangle are 13 cm and 14cm and it’s semi perimeter is 18cm. Find the third side of this triangle.

Answer 1

Answer:

semi perimeter = 18

perimeter = 18*2 = 36

first side of the triangle= 13

second side of the triangle= 14

let the third side be x

first side + second side + third side= perimeter

13+14+x= 36

27+ x= 36

x=36-27

x=9

therefore, the third side of the triangle is 9 cm

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