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Mathematics 21 Online
OpenStudy (anonymous):

what is the area of a quadrilateral ABCD whose sides are 15m, 28m, 40m, 9m.? does anyone know how to solve it ?

OpenStudy (anonymous):

please....help!

OpenStudy (saifoo.khan):

Try drawing

OpenStudy (anonymous):

:/ tried....but dont know the angles and stuff...

OpenStudy (saifoo.khan):

|dw:1360439212127:dw|

OpenStudy (anonymous):

so now what ??

OpenStudy (anonymous):

draw a line from one vertex to the next, a make 2 traigles. calculate the areas, then add them

OpenStudy (saifoo.khan):

OpenStudy (anonymous):

HOW can i calculate the areas of the trian."s ?

OpenStudy (anonymous):

yep, just like that

OpenStudy (anonymous):

how can u be sure its a right angle ?

OpenStudy (goformit100):

its becuse it is right angled

OpenStudy (anonymous):

nah, we dont have the figure .

OpenStudy (goformit100):

we can draw it Analytically like IITIANS

OpenStudy (anonymous):

cause 15=3x9 9=3x3 28=7x4 40=10x4 this is the patern of pythagorean triples

OpenStudy (anonymous):

but still the ans comes ut wrong

OpenStudy (anonymous):

@goformit100 then we can draw like many figures Analytically like"iitians''..how do we know which one's right ?

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