The sides of triangle in rato 3:4:5 .if perimeter is 36cm, area of triangle is?
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Let the sides be 3x,4x,5x
So...
Aq, 3x+4x+5x=36
12x=36
x =36/12
x=3
So the sides are 9,12,15.
Let 9 be the base and 12 and 15 be the other two sides... So now we need to find the height.
Height^2=9^2-4.5^2
Height =7.79
Area=1/2 x 7.79 x 9
=35.05
So...
Aq, 3x+4x+5x=36
12x=36
x =36/12
x=3
So the sides are 9,12,15.
Let 9 be the base and 12 and 15 be the other two sides... So now we need to find the height.
Height^2=9^2-4.5^2
Height =7.79
Area=1/2 x 7.79 x 9
=35.05
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