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Draw a picture first. it always helps visualize

Well there wasn't one but neway heres what I can do..

When it says right angled at (2,1) I think at that point it is 90 deg

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yes dats pretty obvious isn't it??

yup, both the angles will be 45 degrees, i.e, 45+45+90

well ChmE??

Can't anybody solve this??

Ok let me try.

I want to say PQ is just x=2 and PR is just y=1, but what if the triangle is at an angle..

just find points Q and R, given that we know P

then use point slope and all that business

@TuringTest the question is HOW???

let's draw a bigger pic

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btw the answers ae PQ = x+3y -5 and PR = 3x-y-5

lol does that help?

@bahrom7893 No dude!!!
Its already in the question...
:P

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Yeah now what??

I got it so far!!!
next step will be what??

at x=2 what is y ?

calm down dude I am explaining...

:P
Sorry its just that its getting in my head bad!!

well all that is given in the ques, no additionally details are provided..

hahhahahahah..
Exactly what Ive stumbled upon..

by pair of lines they mean PQ and PR

but infinitely I assume, not a finite line segment....

nope its finite alright!!!

then the answer must give bounds to x and y

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yeah that may help me understand what they are asking

PR*

oh I misinterpreted the problem I see

|dw:1347994998473:dw|so my assumption that the legs of the triangle followed the grid was wrong

@TuringTest Still don't get...

even i thought that lines are vertical and horizontal.....but they r not.....even i m stuck...

I know!!!
just one , but I don't understand hw to implement it in this one..

Two lines will be perpendicular to each other if...coeff of x^2 + coeff of y^2 = 0

but this is a first degreeequation so can't really put that in...

yes, that won't help..

Think people THINK!!!!
The person who can solve this will be titled a born genius..
:P

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I dunno I'll have to drop this for now...

NOOOOOOOOOOOOOOOOOOOOOOOOOOO!!!!
:'(

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i don't know what i m doing......

6 equations 8 unknowns.

:P

mM=-1--->7th equation.

1 more equation and we are done.

you mean one more equation if was provided??

1 more equation WE need to find.

Take all the time you need, Ill be here for a while....

lol, very big equation it is!!
PQ=PR and distance formula :P

:P

and even how y-2 and x-2 ??
y-2 and x-1 maybe.....

we can use help of @ganeshie8 here....

Is he any good??

you will see.

m1 is slope of given line = -2
m2 is slope between lines = tan 45 .............

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im trying to work this out by finding out inclination angles for the two lines PR and PQ

since we have a point P(1, 2 ) already, we just need to find the inclination angle

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nice hint @ganeshie8 , i have some idea now....

inclination angles easy to find.........

no this is roundabout way... im sure using ur formula we get to the answer much faste.r...

can someone just elucidate what or how I can solve the problem??

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did u get that figure ? @robinfr93

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solved!

main thing was to find slope of one of the line = 3 using inclination angles....