Question

The perimetre of a triangle is 144 metres and the ratio of sides is 3:4:5 , find the area of triangle PLS ANSWER FAST !!

Answer 1

Hello !!!


Answer :


Let the Sides be 3x , 4x and 5x respectively

Then

We all know that

Perimeter = Sum of all Sides

So,

3x + 4x + 5x = 144

12x = 144

x = 12

Hence the Sides are :

12 × 3 = 36

12 × 4 = 48

12 × 5 = 60

So Sides are 36 , 48 , 60


Now Area


Using Heron formula :


a + b + c / 2 = 36 + 48 + 60 / 2 = 72


= √ 72 ( 72 - 36 ) ( 72 - 48 ) ( 72 - 60)

= √ 72 × 36 × 24 × 12

= √ 746496

= 864sq units


Thank you❤

_____________________________________________
Mark as brainliest Please:)

Answer 2

let take 3x+4x+5x = 144
12x =144
x =144/12
x =12
using heron formula here
under the root
firstly u have to find side
3x here x is 12
3*12=36
4*12=48
12*5=60
find s
s = a+b+c/2
s =36+48+60/2
s =144/2
s = 72
then using ar triangle under the root (s-a)+s-b+s-c
72-36+72-48+72-60 taking the root
36+24+12
6*6+2*11+12 =6*12✓2
answer is 72✓2


s-a+s-b+s-c