Maths Coursework (Tangled triangles)

[old.UKTwister]

ok this is in for tomorrow (wednesday) and im still quite stuck .. so wondering if u can help me.

Here is the Introduction ;
2 students are discussing a problem that was set by their teacher to find the biggest value of the ratio area/perimeter for some triangles

1 students indicates that this was done with measurements of 40,60, and 80 which were given by the teacher but forgets to say what units were used and weather they were angles or sides

Task: Find the triangle which gives me biggest value of area/perimeter and find the other triangles sides and angles. I assume all sides are cm and all angles are degrees.


Righteo then i worked out that there are 20 different triangles

and worked out 2 were impossible because it came up with Sine value above 1 and i worked out that 1 other is impossible because you are just given the angles.

I've worked out the biggest triangle.

gonna be hard to draw on here so i'll give it my best shot
/ \ A
b / \ c
/ \
/ \
/ \
/C_____ B
a

Angle A = 60 Angle B = 80 Angle C = 40

side a = 107.7837084
side b = 122.5671109
side c = 80

(Note i was only given A=60 C=40 and c=80cm at the start of the question)

Ratio = area/perimeter = 4245.849267/310.3508193 = 13.7

So.. i have to find out:

1) why does this give me the biggest ratio
2) why do the numbers 40,60 and 80 give the biggest ratio
3) help lol

I know this is tricky to understand but any help wud be appreciated

phil

 

[xenon2000]

Put

 tags around that ascii art... spaces get formatted out otherwise.

 

[Kempo]

if i knew who you were, had ever spoken to you, or it wasnt this time at night, i might attempt to understand that question, but as none of the above are the case im afraid i cant be arsed to help.

 

[gremlin]

I got lost at 'ok'

 

[bigbb]

I've always been shit at Maths.

 

[caLLous]

I once posted a maths related question here. These people are bloody useless, except for Tremor (I think) whose wife said it wasn't possible.

 

[Summo]

Kah! What does she know?








(Hiya, Samm! )

 

[xane]

BW is _not_ actually known as the bastion of nobel prize winners and Fermats Last Theorem was _not_ discovered one day when the CS server was down, so why post maths questions and expect an answer ?

The annoying thing is most actually do know the answer but are too pig lazy or stoned to bother replying.

 

[Summo]

Help me stone my lazy pig!!11!!1














(Bored. )

 

[Mellow-]

Originally posted by UKTwister
ok this is in for tomorrow (wednesday) and im still quite stuck

It's Thursday now. Did you manage it?

 

[old.Jas]

I'd help - but I can't be assed

 

[caLLous]

That's not what I heard.

 

[old.Jas]

I knew someone would say that

 

[caLLous]

Hehe.

 

[Munkey-]

i posted few maths questions on here. got some nice stuff of trem.


better off asking about science and geography


(and on another note. reallllly fit girl down by the pool. oogled even though i think she knew that i knew that she thought she liked me)

 

[old.Fweddy]

what are you waiting for then? go get her number!