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Mathematics 19 Online
OpenStudy (anonymous):

Describe a method you can use to find the area of the following shape. Provide specific details in your answer, including coordinates and descriptions of shapes used. Then, find the actual area of the figure.

OpenStudy (anonymous):

OpenStudy (anonymous):

plz help!!

OpenStudy (anonymous):

@ganeshie8

OpenStudy (anonymous):

@zzr0ck3r

OpenStudy (anonymous):

can u help? @Majestic4321

OpenStudy (anonymous):

hold on a sec my computers slow

OpenStudy (anonymous):

ok

OpenStudy (anonymous):

Plz help!!! @ganeshie8

OpenStudy (anonymous):

plz help!!!!!!!

ganeshie8 (ganeshie8):

i would break it into a `triangle` and a `trapezoid`

ganeshie8 (ganeshie8):

if you're not good with trapezoids, you may break it into `triangles` and `rectangles`

OpenStudy (anonymous):

i don't have the formula for a trapezoid

ganeshie8 (ganeshie8):

use triangles and rectangles

OpenStudy (anonymous):

i did one of the triangles and then for the second one i couldn't find a third point

OpenStudy (anonymous):

i did triangle afb

OpenStudy (anonymous):

but then for the other one ed i couldn't find a third point

OpenStudy (anonymous):

for triangle afb i got 13.5

OpenStudy (anonymous):

is that right?

ganeshie8 (ganeshie8):

how did you get 13.5 for triangle AFB ? base = ? height = ?

OpenStudy (anonymous):

9 and 3

ganeshie8 (ganeshie8):

are you sure base is really 9 ? cuz when i counted i got 10... let me count again

OpenStudy (anonymous):

i don't know i wasn't sure either

OpenStudy (anonymous):

because there were half squares

OpenStudy (anonymous):

ganeshie8 could you help me in my question? please

ganeshie8 (ganeshie8):

after this, @Frondona

OpenStudy (anonymous):

ok

OpenStudy (anonymous):

so i can subtract the x coordinates to get the length?

OpenStudy (anonymous):

what do i get if i subtract the y coordinates?

OpenStudy (anonymous):

sorry, go on

OpenStudy (anonymous):

ok

ganeshie8 (ganeshie8):

if the line segment was vertical, you can subtract the y coordinates to get its length.

ganeshie8 (ganeshie8):

So, whats the area of triangle AFB ?

OpenStudy (anonymous):

15

ganeshie8 (ganeshie8):

good, take a look at attached pic

ganeshie8 (ganeshie8):

you have one more triangle and rectangle

ganeshie8 (ganeshie8):

find their areas also

OpenStudy (anonymous):

i did but for the bottom triangle there isn't a third point

ganeshie8 (ganeshie8):

you can create one

ganeshie8 (ganeshie8):

think of the intersection as a point

OpenStudy (anonymous):

so i create a point?

ganeshie8 (ganeshie8):

why not

OpenStudy (anonymous):

so the area of the triangle would be three?

ganeshie8 (ganeshie8):

Yep !

OpenStudy (anonymous):

isn't that other shape a square?

OpenStudy (anonymous):

because all the sides are equal?

ganeshie8 (ganeshie8):

good observation, yes its a square !

OpenStudy (anonymous):

what is the area for it?

OpenStudy (anonymous):

i don't have a formula

ganeshie8 (ganeshie8):

side x side

OpenStudy (anonymous):

so 6 * 6?

ganeshie8 (ganeshie8):

Correct !

OpenStudy (anonymous):

do for my answer i would explain the areas of the two triangles and the rectangle then add them up?

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