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 ?
Join the QuestionCove community and study together with friends!
Sign Up
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 ??
Join the QuestionCove community and study together with friends!
Sign Up
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 ?
Join the QuestionCove community and study together with friends!
Sign Up
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
Join the QuestionCove community and study together with friends!
Sign Up
OpenStudy (anonymous):
@goformit100 then we can draw like many figures Analytically like"iitians''..how do we know which one's right ?