## anonymous 5 years ago For a triangle with side lengths 1.5 feet, 2 feet and 3 feet, the area of the triangle is:

1. anonymous

Hi

2. anonymous

Use the formula for calculating area of a triangle when the three sides are known.. First compute s. s is the value of the perimeter divided by 2. In this problem the sum of the sides are: 1.5+2+3=6.5 ft. So s=3.25

4. anonymous

Thanks

Yes I am here, are we having fun yet?

6. anonymous

No, geometry is hard, I have this question on a quiz, it does not list this answer.

Here is the formula:$A=\sqrt{s(s-a)(s-b)(s-c)}$ Where a, b, c are the sides

8. anonymous

Are you sure, that is the answer?

That is the formula. plug in values s=3.25, a=1.5, b=2, and c=3.

10. anonymous

ok, maybe it is none of them, since I do not show your answer.

$\sqrt{3.25(3.25-1.5)(3.25-2)(3.25-3)}$

12. anonymous

I am having a hard time with this open book test lol, they are the worst

$\sqrt{3.25(1.75)(1.25)(0.25)}$

using my calculator i get:$\sqrt{1.77734375}$

15. anonymous

ok

that would be: 1.33317 sq ft

Better double check my figures cdunn

18. anonymous

lol

19. anonymous

I think you are right

20. anonymous

I have 19 replies, how can I see the rest of them?

are you looking at the open study web page, I am and I see all 20 replies

22. anonymous

I cannot see them

maybe if you refresh your browser

24. anonymous

ok good luck with it. I got that formula for area from a very old text. bye

26. anonymous

thanks