## shayanreloaded 3 years ago If a2 + b2 + c2 = 250 and ab + bc + ca = 3, then a + b + c is

1. WAHEEDAHMED

shayan use here the formula of (a+b+c)^2 this would help

2. asnaseer

thanks a lot 16 ans

or -16?

Area of triangle, having sides as 8, 11 and the perimeter 32 is

6. ezhyl_marie

(a + b + c)^2= a^2 + b^2 + c^2 + 2(ab + bc + ca), since, a^2 + b^2 + c^2 = 250 and ab + bc + ca = 3, (a + b + c)^2 = 250 + 2(3) = 256 = 16^2 therefore: a + b + c = 16 ,.

why not -16?

Area of triangle, having sides as 8, 11 and the perimeter 32 is

9. WAHEEDAHMED

area is always taken positive shayanreloaded thats why...

lol these are 2 dif qs

11. WAHEEDAHMED

i have given u the answer of above shayan

12. WAHEEDAHMED

not the second one

for first -16 is possible right? and help wid 2nd

14. WAHEEDAHMED

15. WAHEEDAHMED

no area cant be -16 shayan

this is fr 1st question which is not bout area

17. WAHEEDAHMED

ok my mistake both 16 and -16 are possible sorry about that shayan ...i hope u would understand

yeah i do now 2nd ques lol

19. WAHEEDAHMED

do you know the formula for perimeter shayan the solution is in it

3rd side is 13 i dont think i rem. herons formula

22. WAHEEDAHMED

after getting third side u will find s=a+b+c/2

16 ok

24. Siddharth18

25. WAHEEDAHMED

now use this A=squareroot(s(s-a)(s-b)(s-c)

26. WAHEEDAHMED

did u get the answer shayan