## spidergirl51 3 years ago 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?

1. spidergirl51

help! any body some good in algebra 1

2. spidergirl51

can you guys write the steps and how you got the ansewr

3. gallaxhar

((m+3)*2)+m=P ?

4. gallaxhar

I'm not sure though

5. psi9epsilon

PERIMETER is sum OF ALL SIDES

6. spidergirl51

oh

7. psi9epsilon

So if sides are m, and m+3 and m+3 sum is 3m+6

8. spidergirl51

yea so um idk this is algebra its in equalities i think

9. psi9epsilon

10. spidergirl51

yea so what do i do first

11. psi9epsilon

|dw:1351133317407:dw|

12. spidergirl51

u sure?

13. psi9epsilon

|dw:1351133370366:dw|

14. psi9epsilon

yes very sure, do you want to find the perimeter or AREA ?, REMEBER PERIMETER IS ALWAYS the SUM of all sides

15. spidergirl51

its the perimeter i need to find

16. gallaxhar

so my formula ((m+3)*2+m)=P works too :)

17. psi9epsilon

yes so thats correct, perimeter is m+ m+3 + m+3 = 3m+6

18. spidergirl51

i combined the liked terms and i got 3m+6

19. psi9epsilon

you are correct

20. spidergirl51

then i divide it by 3 m on both sides which get m=2

21. spidergirl51

right or wrong?

22. psi9epsilon

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?

23. gallaxhar

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

24. spidergirl51

oh okay thanks C: