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The perimeter of a triangle is 30 cm. If the circumference of its incircle is 44 cm then find the area of the triangle
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Some help please.....
|dw:1395468307515:dw|
2*pi*r=44 pi=22/7 we knw 2*22/7*r=44 44*r/7=44 r=7
I've already done that but how do you find the sides of the triangle?
perimeter =sum of sides of triangle
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30=a+b+c
is anything given about triabgle like equilateral or isosceles or anything ???
No....... That's the problem
area=r*s r=inradius=7 s=(sum of side of triangle)/2 s=(a+b+c)/2=30/2=15 area=15*7=105
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