Math, asked by FuturePoet, 1 year ago

Very Easy Question to Solve

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Answered by Anonymous
6
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Anonymous: its not her fault the diagram in the question is itself wrong ...... in the diagram there shud be -5
siddhartharao77: Ok.
Anonymous: Sorry, in diagram, it is 5 but in question, y2 is ( - 5 ). And I gave answer according to the diagram.
Anonymous: its ok its not ur fault :-)
Anonymous: But my answer is wrong then. And it is brainliest also. Brainliest answers are reliable.
Anonymous: Please delete it.
Anonymous: nope the question is itself wrong ! it has a wrong diagram ......... but your answer should get an edit option . then u can correct it ........
Anonymous: Thanks for the edit option :)
Anonymous: welcome :-)
Anonymous: nice handwriting
Answered by Anonymous
10

I have done with Δ ABC and Δ ADC but my answer is coming different !


Find the area of Δ ABC


A ( - 5 , 7 )

B ( - 4 , - 5 )

C ( - 1 , - 6 )


Comparing this with coordinates we get  :-


\mathsf{x_1=-5}\\\mathsf{x_2=-4}\\\mathsf{x_3=-1}\\\\\mathsf{y_1=7}\\\mathsf{y_2=-5}\\\mathsf{y_3=-6}


\mathsf{Area\:of\:\triangle\:ABC\:=\frac{1}{2}|x_1(y_2-y_3)+x_2(y_3-y_1)+x_3(y_1-y_2)| }\\\\\mathsf{\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:=\frac{1}{2}|(-5)(-5-(-6))+(-4)(-6-7)+(-1)(7-(-5))|}\\\\\mathsf{\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:=\frac{1}{2}|(-5)(1)+(-4)(-13)+(-1)(12)|}\\\\\mathsf{\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:=\frac{1}{2}|-5+52-12|}\\\\

\mathsf{.\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:=\frac{1}{2}|35|}


Find the area of Δ ADC


A ( - 5 , 7 )

D ( 4 , 5 )

C ( - 1 , -6 )


Comparing this with coordinates we get  :-


\mathsf{x_1=-5}\\\mathsf{x_2=4}\\\mathsf{x_3=-1}\\\\\mathsf{y_1=7}\\\mathsf{y_2=5}\\\mathsf{y_3=-6}


\mathsf{Area\:of\:\triangle\:ADC\:=\frac{1}{2}|x_1(y_2-y_3)+x_2(y_3-y_1)+x_3(y_1-y_2)| }\\\\\mathsf{\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:=\frac{1}{2}|(-5)(5-(-6))+(4)(-6-7)+(-1)(7-5)|}\\\\\mathsf{\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:=\frac{1}{2}|(-5)(11)+(4)(-13)+(-1)(2)|}\\\\\mathsf{\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:=\frac{1}{2}|-55-52-2|}\\\\\mathsf{\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:=\frac{1}{2}|-109|}


Area of ABCD


\mathsf{Area\:of\:ABCD=\frac{1}{2}|35|+\frac{1}{2}|-109|}\\\\\mathsf{\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:=\frac{1}{2}(|35|+|-109|)}\\\\\mathsf{\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:=\frac{1}{2}(35+109)}\\\\\mathsf{\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:=\frac{1}{2}\times144}\\\\\mathsf{\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:=72\:units^2}


\textsf{\huge{\underline{\underline{\underline{ANSWER}}}}}

\mathsf{\underline{The\:area\:of\:ABCD\:is\:72\:units^2}}


Please let me know the step where I was wrong ..............


Hope its correct and helpful ............


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zeus1234: amar geography boi ki tor kache. ami kanchan
Anonymous: ha amar kache using double profile wait !!
Anonymous: legendary answer _/\_
Anonymous: thanks :-)
Anonymous: bro plz plz plz answer my question
Anonymous: sure will try ....
Anonymous: thank you so much ^_^
zeus1234: bhai Monday die dish. amar Tuesday exam.
Anonymous: stop chatting in the comments ! I cannot understand ur language !
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