## alainabbyboo22 3 years ago Given polygon BRAIN~POWEQ what is the perimeter of BRAIN? A. 23.50 B. 58.75 C. 35.25 D. 57.25

1. alainabbyboo22

2. psi9epsilon

3. alainabbyboo22

4. psi9epsilon

add BR, RI, IA, AN, NB

5. alainabbyboo22

what do i do for the "y+5" though ? i can't add y ..

6. alainabbyboo22

this is so confusing .. can you at least set it up in the formula how i should add it together ? i don't get it ....

7. kgeorge1

I don't understand either.

8. psi9epsilon

9. psi9epsilon

also add 4+14z+4.5+3+2x+1 for the other polygon compare them as they are same

10. alainabbyboo22

but it only asks what the perimeter is for BRAIN . and what do i put in for y ? i can't just add y with the numbers .

11. kgeorge1

Does the question provide any other information?

12. alainabbyboo22

just the picture .

13. kgeorge1

Maybe you have to make some sort of ratio if we assume they are similar shapes

14. psi9epsilon

equate 2x+1=12.5, 14z=7.5, 5+y=4.5, that should help you out

15. kgeorge1

yes i thought of that but 10 does not = 4 nor does 7.5 = 3

16. psi9epsilon

think think,you are pretty close

17. timo86m

add up all the sides. ANd use pythogorean theorom where necessary to get a side.

18. kgeorge1

http://en.wikipedia.org/wiki/Pythagorean_theorem I still don't get it

19. alainabbyboo22

same .

20. Mikael

Ell it seems (on first look) they did not supply enough numerical data...

21. kgeorge1

please explain the pythagorean theorem

22. kgeorge1

these are not right triangles so how does that apply?

23. alainabbyboo22

can someone give me a formula ? i don't understand . ):

24. kgeorge1

http://www.youtube.com/watch?v=0HYHG3fuzvk Can someone please explain how this would apply to this problem?