Question

sides of a triangle are 30cm, 40cm and 50cm. find its area ​

Answer 1

Let,

a = 30 cm

b = 40 cm

c = 50cm

now , semi-perimeter, s = (30 + 40 + 50)/2

s = 120 /2  = 60

now, by herons(hero formula yaad hai na?) formula , we get:

$\sqrt{s(s-a)(s-b)(s-c)}$

now, substituting the values

$\sqrt{60(60-30)(60-40)(60-50)}$

$= \sqrt{60(30)(20)(10)}$

$= \sqrt{6)(6)(10000)}$

$= 100*6= 600$

therefore, Area is 600 cm^2

MARK ME BRAINLIESt AND FOLLOW ME

Answer 2

Answer:

A=600cm²

Step-by-step explanation:

A=s(s﹣a)(s﹣b)(s﹣c)

s=a+b+c

2

A=1

4﹣a4+2(ab)2+2(ac)2﹣b4+2(bc)2﹣c4=1

4·﹣304+2·(30·40)2+2·(30·50)2﹣404+2·(40·50)2﹣504=600cm²