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Mathematics 8 Online
OpenStudy (anonymous):

Bianca needs to paint a logo made using two right triangles. The dimensions of the logo are shown below. What is the difference between the area of the large triangle and the area of the small triangle?

OpenStudy (anonymous):

OpenStudy (anonymous):

@undeadknight26 @unicwaan @vera_ewing @aaronq

OpenStudy (anonymous):

@Michele_Laino @lυἶცἶ0210

OpenStudy (anonymous):

^ Yes your here (::::::

OpenStudy (michele_laino):

the area of the small triangle is: A=(6*2)/2=...

OpenStudy (anonymous):

12 but what does /2 stand for?

OpenStudy (michele_laino):

since, in general the area of a triangle is: A= (base* height)/2

OpenStudy (anonymous):

so 6*2 *1/2?

OpenStudy (michele_laino):

yes!

OpenStudy (michele_laino):

what do you get?

OpenStudy (anonymous):

6

OpenStudy (michele_laino):

correct!

OpenStudy (michele_laino):

similarly, the area of the other triangle is: \[\Large A = \frac{{base \times height}}{2} = \frac{{3 \times 7}}{2} = ...?\]

OpenStudy (anonymous):

so its 27/2

OpenStudy (michele_laino):

\[\Large A = \frac{{base \times height}}{2} = \frac{{3 \times 7}}{2} = \frac{{21}}{2} = ...?\]

OpenStudy (michele_laino):

what is 21/2=...?

OpenStudy (anonymous):

10.5

OpenStudy (michele_laino):

correct! so total area is: 6+10.5=...?

OpenStudy (anonymous):

16.5!! (: Yay

OpenStudy (michele_laino):

:)

OpenStudy (anonymous):

Its makes so much sense now c: Thank you!

OpenStudy (michele_laino):

:)

OpenStudy (michele_laino):

I'm very sorry the right option is B) since: 10.5-6=4.5 cm^2

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