Question

The perimeter of a triangle is 18 cm and it's sidestill are inot the ratime 1:2:3.find the side of a triangle

Answer 1

Hey friend here is your answer

Perimeter of triangle = sum of all sides.

Let common multiple be x,

1x + 2x + 3x = 18

6x = 18

x = 3

Therefore sides of triangle are,

3 ,
3 × 2 = 6
3 × 3 = 9

Hope it helps you.

Answer 2

HI MATE

THIS IS YOUR ANSWER

1x+2x+3x = 18 cm
6x = 18 cm
x =
$\frac{18}{6}$
x = 3

a = 1x. b = 2x. c = 3x
= 1*3. =2*3. =3*3
= 3 cm. = 6 cm. =9 cm


s=a+b+c/2
s = 3+6+9/2
s = 18 cm

s-a=18-3 = 15
s-b=18-6 = 12
s-c=18-9 = 9

area of a triangle=
$\sqrt{s(s-a)(s - b)(s - c)}$
DO IT YOURSELF.

HOPE THIS'LL HELP YOU