## lilnicki32 4 years ago the perimeter of a triangle is 76 cm. side a of the triangle is twice as long as side b. side c is 1 cm longer than side a. find the length of each side.

1. abz_tech

hmm do u want the answer or just a hint?

2. lilnicki32

3. abz_tech

|dw:1321814483458:dw| x+2x+2x+1=76 5x = 76-1 x=15

4. ktklown

the answer is a=30 b=15 c=31

5. abz_tech

b= 15, a = 30, c = 31

6. ktklown

if you just want the answer, there it is

7. lilnicki32

i meant the way u solve it and the answer

8. ktklown

done! :-)

9. abz_tech

there look at my nub drawing

10. ktklown

Sure... a = tan(b) b+tan(a)=pi c = 45/sin(c*a*pi^2) solve all that and you get a=30, b=15, c=31

11. lilnicki32

i meant solve it for me

12. waheguru
13. abz_tech

-.-.... x+2x+2x+1=76 5x = 76-1 x=15 b= 15, a = 30, c = 31

14. ktklown

i will solve it for you... a = tan(b) b+tan(a)=pi c = 45/sin(c*a*pi^2) a = tan(b) = sin(pi)+4 a = sin(pi) + 4 a = 30 b +tan(a) = pi tan(a) = pi - b b = pi^2 + 4 b = 15 c = a+1 c = 30 + 1 c = 31 does that make sense?

15. lilnicki32

the first side of a triangle is 8 m shorter than the second side. the third side is 4 times as long as long as the first side. the perimeter is 26 m. find the length of each side.

16. ktklown

right, a=30, b=15, c=31

17. ktklown

oh wait this is a new problem?

18. ktklown

sorry, i'll solve this one too

19. ktklown

a = cot(45)^2 + 30 a = pi^2 - e^t + 30 a = 3 b = a^2 / cot(45) * pi^3 b = a^2 - 30 b = 11 c = b+a^4 - n(4) c = b^2 -2a c = 12 so the answer is a=3, b=11, c=12

20. ktklown

you can check it's right because a+b+c=26

21. ktklown

22. lilnicki32

can u do it in another way

23. abz_tech

sec

24. ktklown

i can help you do it another way. call the first side "a", the second side "b" and the third side "c". it says "the first side is 8 meters shorter than the second side". can you write that as an equation?

25. ktklown

A is 8 meters shorter than B. can you write that down as an equation?

26. abz_tech

|dw:1321815214355:dw|

27. lilnicki32

no u just do it

28. ktklown

29. ktklown

if you just want the answer copy what i wrote

30. ktklown

if you actually want to learn then write something down

31. abz_tech

so... x-8+x+4(x-8) = 26

32. abz_tech

now solve that

33. abz_tech

for x

34. ktklown

there you go, you have the answer two different ways now

35. lilnicki32

ok i cant get it

36. lilnicki32

37. abz_tech

-.- take a paper and a pen/pencil and draw that diagram

38. ktklown

I'm sorry nicki But I'm not going to help any more. You are not putting any effort into this at all. Like, 0 effort. You're just waiting for the answers so you can copy them down and turn them in.

39. lilnicki32

i did

40. ktklown

what did you do? show me how far you got and I will help

41. abz_tech

first side is 8 cm shorter so, b is x, a = x-8

42. abz_tech

third side is 4 times bigger than first side... so... 4(x-8)

43. abz_tech

they dotn tell u about b so we consider it 'x'

44. lilnicki32

im trying my best ok

45. abz_tech

there fore we get the equation, x+4(x-8)+x-8=26

46. lilnicki32

yeah

47. abz_tech

x+4x-32+x-8=26

48. abz_tech

solve it now, bring the x to one side and numbers to other

49. abz_tech

you should know this, if ur getting those questions for homework/revising..it pretty much basic algebra

50. lilnicki32

yea

51. lilnicki32