lilnicki32
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.
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abz_tech
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hmm do u want the answer or just a hint?
lilnicki32
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the answer
abz_tech
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|dw:1321814483458:dw|
x+2x+2x+1=76
5x = 76-1
x=15
ktklown
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the answer is a=30 b=15 c=31
abz_tech
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b= 15, a = 30, c = 31
ktklown
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if you just want the answer, there it is
lilnicki32
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i meant the way u solve it and the answer
ktklown
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done! :-)
abz_tech
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there look at my nub drawing
ktklown
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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
lilnicki32
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i meant solve it for me
abz_tech
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-.-....
x+2x+2x+1=76
5x = 76-1
x=15
b= 15, a = 30, c = 31
ktklown
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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?
lilnicki32
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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.
ktklown
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right, a=30, b=15, c=31
ktklown
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oh wait this is a new problem?
ktklown
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sorry, i'll solve this one too
ktklown
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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
ktklown
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you can check it's right because a+b+c=26
ktklown
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i hope this was helpful
lilnicki32
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can u do it in another way
abz_tech
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sec
ktklown
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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?
ktklown
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A is 8 meters shorter than B. can you write that down as an equation?
abz_tech
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|dw:1321815214355:dw|
lilnicki32
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no u just do it
ktklown
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i did it already above
ktklown
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if you just want the answer copy what i wrote
ktklown
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if you actually want to learn then write something down
abz_tech
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so... x-8+x+4(x-8) = 26
abz_tech
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now solve that
abz_tech
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for x
ktklown
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there you go, you have the answer two different ways now
lilnicki32
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ok i cant get it
lilnicki32
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can u please solve it
abz_tech
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-.- take a paper and a pen/pencil and draw that diagram
ktklown
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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.
lilnicki32
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i did
ktklown
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what did you do? show me how far you got and I will help
abz_tech
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first side is 8 cm shorter so, b is x, a = x-8
abz_tech
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third side is 4 times bigger than first side... so... 4(x-8)
abz_tech
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they dotn tell u about b so we consider it 'x'
lilnicki32
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im trying my best ok
abz_tech
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there fore we get the equation, x+4(x-8)+x-8=26
lilnicki32
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yeah
abz_tech
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x+4x-32+x-8=26
abz_tech
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solve it now, bring the x to one side and numbers to other
abz_tech
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you should know this, if ur getting those questions for homework/revising..it pretty much basic algebra
lilnicki32
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yea
lilnicki32
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can u please solve it for me please im beggin you