Question

length of a triangle are 3:4:5 perimeter is 120 find the area? plzz friends.....
Friends Help Me.....

Answer 1

This is the answer i hope it is helpfull

Answer 2

SOLUTION....

Let length of triangles are 3x, 4x and 5x.
Then, perimeter of triangle-
3x+4x+5x = 120
12x = 120
x = 120÷12
x = 10

Therefore length of sides are 30, 40 and 50.
So, a = 30, b = 40 and c = 50.

(Use Heron' s Formula.)
S = 120÷2 = 60.

Area of triangle =
$\sqrt{s(s - a)(s - b)(s - c)}$
$\sqrt{60(60 - 30)(60 - 40)(60 - 50)}$
$\sqrt{60 \times 30 \times 20 \times 10}$
$\sqrt{60 \times 600 \times 10}$
$\sqrt{60 \times 60 \times 10 \times 10}$
So,
60 × 10
600units.

☆☆ @ Mr Thakur ☆☆