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Mathematics 14 Online
OpenStudy (anonymous):

help please

OpenStudy (anonymous):

OpenStudy (anonymous):

@sammixboo

sammixboo (sammixboo):

I can't pen the file

OpenStudy (anonymous):

Split it into three rectangles

OpenStudy (anonymous):

|dw:1430945293240:dw|

OpenStudy (anonymous):

for rectangle one, what are the side lengths?

OpenStudy (anonymous):

umm i don't know

OpenStudy (anonymous):

|dw:1430945552418:dw|

OpenStudy (anonymous):

what is the side length labelled x. It's on the original figure.

OpenStudy (anonymous):

it's 12, do you see how i got that?

OpenStudy (anonymous):

yes

OpenStudy (anonymous):

ok, so what is the other side of the rectangle?

OpenStudy (anonymous):

12?

OpenStudy (anonymous):

nope, it's 23.

OpenStudy (anonymous):

oh sorry that was going to be my second answer...

OpenStudy (anonymous):

so now we know the sides are 12 and 23. now find the area of the first rectangle

OpenStudy (anonymous):

12 x 23

OpenStudy (anonymous):

276

OpenStudy (anonymous):

yep. so what can we say about rectangles 1 and 3?

OpenStudy (anonymous):

they are the same?

OpenStudy (anonymous):

that's right

OpenStudy (anonymous):

now lets solve rectangle 2

OpenStudy (anonymous):

ok

OpenStudy (anonymous):

what's 31-12?

OpenStudy (anonymous):

19

OpenStudy (anonymous):

|dw:1430946712343:dw|

OpenStudy (anonymous):

what is x?

OpenStudy (anonymous):

69

OpenStudy (anonymous):

ok, so what's the area of rectangle 2?

OpenStudy (anonymous):

1,311?

OpenStudy (anonymous):

yep, so add up the 3 areas we found to get the final answer

OpenStudy (anonymous):

so 1,311 + 276+276?

OpenStudy (anonymous):

yes

OpenStudy (anonymous):

1,863

OpenStudy (anonymous):

that's right, good job

OpenStudy (anonymous):

thank you

OpenStudy (anonymous):

no problem

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