the perimeter of a triangle is 36 cm and its sides are in the ratio 3:4:5. find thr area of the triangle
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let the sides of the triangle be 3x ,4x and 5x perimeter of triangle is =36cm
3x + 4 x + 5 x =36
12x=36
X=36÷12
X=3
now,3 x = 3 ×3=9
4x=4×3=12
5x=5×3=15
area of triangle=1÷2×base×height
1÷2×12×9
1÷2×108
1
_×108
2
54cm
3x + 4 x + 5 x =36
12x=36
X=36÷12
X=3
now,3 x = 3 ×3=9
4x=4×3=12
5x=5×3=15
area of triangle=1÷2×base×height
1÷2×12×9
1÷2×108
1
_×108
2
54cm
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