Question

if s -a =12 cm s-b =19 cm and s-c = 4cm then find the value of s​

Answer 1

Answer:

s = 35

Step-by-step explanation:

Add all the given equations

s-a + s-b + s-c = 12 + 19 +4

=> 3s - (a+b+c) = 35

S means Semi perimeter.

s = (a+b+c)/2 => (a+b+c) = 2s

We already have 3s - (a+b+c) = 35

Now putting the above value of (a+b+c)

=> 3s - 2s = 35

=> s = 35