Question

the length of the sides of a triangle are in the ratio 3:4:5 and its perimeter is 144cm. find the area of a triangle ​

Answer 1

Answer:

let the no. be 3x and 4x and 5x

Step-by-step explanation:

3x + 4x +5x =144cm

12x=144cm

x =12cm

side one-36

side two-48

side three-60

Answer 2

Answer:

let the length of sides of the triangle be 3x,4x and 5x respectively

perimeter of triangle=sum of all sides

=144=3x+4x+5x

=144=12x

=144/12=X

=12=x

sides of the triangle=3x,4x,5x

=3*12,4*12,5*12

=36cm,48cm,60cm

Area of triangle=1/2*Base*Height

=1/2*36*48

=864cm^2