I’ve figured out coordinate p but I’m not sure on how to get the area and length
Thanks
#Determine area and lengths using coordinate geometry
inland lantern
sudden trench
I’ve figured out coordinate p but I’m not sure on how to get the area and length...
if you rearrange the first equation you can find the y-intercept and you already have it for the second one which is -3, find the difference between that and that is the length of your base
and from your point P to the y intercept, you know it’s 5 since the x value is 5, and that’s your height of your triangle
left plinth
@inland lantern your coordinate for P is wrong
when you substitute in x - 3
it becomes 2(x-3) + x = 12
not 2x -3 + x = 12
its meant to be 2x - 6 + x = 12
so x is 6
not 5
inland lantern
Oh my bad thanks
inland lantern
if you rearrange the first equation you can find the y-intercept and you already...
The y intercept would be -6? And then I do 1/2 times -6 times 6
Oh wait
Times -3
sudden trench
The y intercept would be -6? And then I do 1/2 times -6 times 6
y-intercept isn’t -6, it’ll be positive since it’s greater than 0
It’s 12/2 which is 6
inland lantern
Ye
sudden trench
so the difference between. 6 and -3?
inland lantern
3
sudden trench
not quite
sudden trench
like the whole length
inland lantern
-9 my bad
sudden trench
Because that’s your base of the triangle
inland lantern
Ya
sudden trench
So it’ll be 1/2 x 9 x 6
inland lantern
And what about for the length do I add them together
sudden trench
And what about for the length do I add them together
This is AS level right?
you would use the formula
inland lantern
A level ye
sudden trench
yh, use the above formula to find length
inland lantern
Alright cool man thanks for the help