the length of sides of a triangle are in the ratio 3:4:5.find the area of triangle of its perimeter 144cm
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Answered by
56
Let side a = 3x
Let side b =4x
Let side c =5x
Perimeter of triangle = AB+BC+CA
144 cm = 3x+4x+5x
144 cm = 12x
x = 144/12
x = 12 cm
Side a = 3x
= 3*12
= 36 cm
Side b = 4x
= 4*12
= 48 cm
Side c = 5x
=5*12
= 60 cm
Let side b =4x
Let side c =5x
Perimeter of triangle = AB+BC+CA
144 cm = 3x+4x+5x
144 cm = 12x
x = 144/12
x = 12 cm
Side a = 3x
= 3*12
= 36 cm
Side b = 4x
= 4*12
= 48 cm
Side c = 5x
=5*12
= 60 cm
Answered by
7
864 sq.cm is the correct answer
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