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Mathematics 11 Online
OpenStudy (anonymous):

Find the area of the shape #2 Picture attached

OpenStudy (anonymous):

#2

OpenStudy (anonymous):

for parallelogram the area is double the area of a triangle of same base and height

OpenStudy (anonymous):

oh so what would that look like in formula form

OpenStudy (anonymous):

:) you try, let us see

OpenStudy (anonymous):

What was the form for triangle?

OpenStudy (anonymous):

check the previous question

OpenStudy (anonymous):

okay

OpenStudy (anonymous):

okay the answer is area of parallelogram = height * base = 8 * 14 = 112

OpenStudy (anonymous):

so 112

OpenStudy (anonymous):

yeah

OpenStudy (anonymous):

aw h

OpenStudy (anonymous):

okay :)

OpenStudy (anonymous):

:)

OpenStudy (anonymous):

I guess you can do #3 yourself

OpenStudy (anonymous):

illl try then see if im right will you ?

OpenStudy (anonymous):

yeah sure

OpenStudy (anonymous):

okay so 6*6/2 right

OpenStudy (anonymous):

6 is base of one hlf right?

OpenStudy (anonymous):

right

OpenStudy (anonymous):

what is height here?

OpenStudy (anonymous):

oh , so 12 and 10

OpenStudy (anonymous):

oh nonot right

OpenStudy (anonymous):

yeah total base is 12 correct

OpenStudy (anonymous):

so 12*___?

OpenStudy (anonymous):

but for height is the dotted line

OpenStudy (anonymous):

do you know Pythagorean theorem?

OpenStudy (anonymous):

yes, but i forgot

OpenStudy (anonymous):

so at the moment then no

OpenStudy (anonymous):

height^2 + Base^2 = Hypotenuse^2

OpenStudy (anonymous):

oh thats right!

OpenStudy (anonymous):

hence height here is sqrt(10^2 - 6^2) = sqrt(64) = 8

OpenStudy (anonymous):

wiat the answer isnt 8

OpenStudy (anonymous):

hence the area is = 0.5* total base * height = 0.5 * 12 * 8

OpenStudy (anonymous):

oh 48

OpenStudy (anonymous):

yeah

OpenStudy (anonymous):

awesome

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