1. The perimeter of a triangle is 450 m and its side
are in the ratio 12 : 5: 13. Find the
area of the triangle
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Perimeter of triangle
=sum of all sides
Let the sides of triangle be 12x,5x,13x respectively
A.T.Q.,
12x+5x+13x=450
30x=450
X=450/30
X=15
so first side= 12x15=180
second side=5x15=75
third side =13x15=195
Area of triangle =1/2xbasexheight
=1/2x12x5
30 cm
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