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Mathematics 7 Online
OpenStudy (chosenmatt):

What is the perimeter of the figure? A.144 cm B.76 cm C.74 cm D.45 cm http://static.k12.com/calms_media/media/1419000_1419500/1419340/1/8fd086e9663e68f0acf8dabc6211ed897143070b/MS_PA_130922_171112.jpg

OpenStudy (chosenmatt):

@iGreen

OpenStudy (anonymous):

Perimeter is adding up all the angles.

OpenStudy (chosenmatt):

yeah i know but it doesnt have numbers on all sides

hartnn (hartnn):

perimeter = adding up all the SIDES*

OpenStudy (chosenmatt):

what about the top part?

hartnn (hartnn):

let that be x xo you have 2 xs on the top and an 8 on the top

hartnn (hartnn):

x+x+8= 20 find x

OpenStudy (chosenmatt):

6 for all x

hartnn (hartnn):

x=6 so now can you add up all sides?

OpenStudy (chosenmatt):

yep thanks :)

hartnn (hartnn):

let me know what u got! just to verify your answer :)

OpenStudy (chosenmatt):

i got an 80%

hartnn (hartnn):

i meant answer to this question :P did you get 74 cm ?

OpenStudy (chosenmatt):

yes

hartnn (hartnn):

\(\huge \checkmark \)

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