spidergirl51
An isosceles triangle has a base of m and sides of m + 3. What simplified expression can be used to find the perimeter of the triangle?
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spidergirl51
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help! any body some good in algebra 1
spidergirl51
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can you guys write the steps and how you got the ansewr
gallaxhar
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((m+3)*2)+m=P ?
gallaxhar
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I'm not sure though
psi9epsilon
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PERIMETER is sum OF ALL SIDES
spidergirl51
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oh
psi9epsilon
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So if sides are m, and m+3 and m+3 sum is 3m+6
spidergirl51
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yea so um idk this is algebra its in equalities i think
psi9epsilon
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which is your perimeter
spidergirl51
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yea
so what do i do first
psi9epsilon
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|dw:1351133317407:dw|
spidergirl51
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u sure?
psi9epsilon
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|dw:1351133370366:dw|
psi9epsilon
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yes very sure, do you want to find the perimeter or AREA ?, REMEBER PERIMETER IS ALWAYS the SUM of all sides
spidergirl51
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its the perimeter i need to find
gallaxhar
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so my formula ((m+3)*2+m)=P works too :)
psi9epsilon
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yes so thats correct, perimeter is m+ m+3 + m+3 = 3m+6
spidergirl51
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i combined the liked terms and i got 3m+6
psi9epsilon
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you are correct
spidergirl51
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then i divide it by 3 m on both sides which get m=2
spidergirl51
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right or wrong?
psi9epsilon
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why do you want to divide, you just need the perimeter ,
P= 3m+6
are you supposed to find the value of m, and do you have the value of perimeter given?
gallaxhar
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spider, "m" is a variable - it has no number except the one you, or your textbook or teacher give it, if they didn't give you a number for Perimeter variable, or m, then it's just m
spidergirl51
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oh okay thanks
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