Two sides of a triangle are 14 cm and 20 cm.The perimeter of a triangle is 48 cm.What is the measure of its third side?
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Answer:
Semiperimeter, S=18 cm
Let the side of the triangle be a,b,c such that
a=16 cm, b=14 cm
S=
2
a+b+c
=
2
16+14+c
18=
2
30+c
c=36−30=6 cm
Therefore, third side of triangle is 6 cm
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