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Mathematics 8 Online
OpenStudy (anonymous):

*MEDAL FAN AND TESTIMONIAL* Lisa glued two pieces of wood together to make the letter L in her art class. She plans to paint all sides of it purple, including the base. The longer piece of wood has dimensions of 2 inches by 2 inches by 6 inches. The shorter piece of wood has dimensions of 3 inches by 2 inches by 2 inches. How many square inches of purple paint will Lisa use to paint her letter L?

OpenStudy (e.mccormick):

Well, what you need to find is the exposed surface area. Do you know why I say exposed?

OpenStudy (anonymous):

yes

OpenStudy (e.mccormick):

OK, so what issue are you having in finding the exposed surface area?

OpenStudy (anonymous):

https://app107.studyisland.com/pics/70352no2.png

OpenStudy (anonymous):

every time i do the math it turns out wrong

OpenStudy (e.mccormick):

Well, what math are you using?

OpenStudy (anonymous):

area

OpenStudy (e.mccormick):

I mean show me the numbers and how you are multiplying and adding.

OpenStudy (anonymous):

ok hang on

OpenStudy (anonymous):

Oi just got it! thx for your help anyways tho :)

OpenStudy (e.mccormick):

Were you forgetting to subtract where the one end covered part of one side? 2x2, 2 ends 2x6, 4 sides 2x2, 2 ends 2x3, 4 sides But, one of the ends and an area the same as one end are where things are glued, so: 2x2, -2 ends 2x2x2 + 2x6x4 + 2x3x4

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