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Mathematics 7 Online
OpenStudy (lordhelix8th):

Which figures can be used to find the area of the composite figure? Choose exactly two answers that are correct. A. a triangle with an area of 96 in2 B. a triangle with an area of 192 in2 C. a semicircle with an area of 50 in2 D. a semicircle with an area of 100 in2

OpenStudy (lordhelix8th):

OpenStudy (lordhelix8th):

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OpenStudy (lordhelix8th):

@acxbox22 @samanthagreer

OpenStudy (lordhelix8th):

@GreenCat

OpenStudy (lordhelix8th):

plzz help

OpenStudy (greencat):

the area of the semicircle must have pi in it somewhere

OpenStudy (greencat):

so remove c and d

OpenStudy (lordhelix8th):

so a and b

OpenStudy (lordhelix8th):

yes or no

OpenStudy (greencat):

a OR b

OpenStudy (greencat):

area of triangle= leg1xleg2/2

OpenStudy (greencat):

so 16x12/2

OpenStudy (greencat):

which is 48x2

OpenStudy (lordhelix8th):

Choose exactly two answers that are correct.

OpenStudy (greencat):

oh ok

OpenStudy (greencat):

so there is pi in the semicircle

OpenStudy (greencat):

but the pi is not visible in copypaste

OpenStudy (greencat):

d=20 r=10 Area=r^2pi

OpenStudy (greencat):

Area=10^2pi=100pi

OpenStudy (greencat):

but it is a semicircle so divide by 2

OpenStudy (greencat):

100/pi/2=50pi

OpenStudy (lordhelix8th):

so a and c

OpenStudy (greencat):

yes

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