Math Problemo

[R0BD0G]

i have a right angle triangle 6 x 6.2 x 8.8.
whats the rule for working it out??

[falzoony]

What are you trying to work out?

[R0BD0G]

thats what i thought it might be but wasnt sure. i thought pythag was usually used if you were missing the length of the hypotenuese

[mitch_302]

what exactly are you trying to work out?

[davonafairlane]

what do you want to work out?
angles
sine = opposite/hypotenuse
cosine = ajacent/hypotenuse
tangent = opposite/ajacent

if you want to work the angles out from lengths you use the inverse sine/cosine/tangent buttons on the calculator, usually sin-1, cos-1 or tan-1 on the calculator

pythagerous' theroem
a squared + b squared = c squared

[R0BD0G]

area. sorry

[boss-290]

LOl good ole maths

[davonafairlane]

Could you calculate it like a rectangle/square and divide by 2. Length*width then divide by two? Two equal right angle triangles placed on each other would be a square or rectangle depending on triangle shape? Do you know what I mean?

[4Vman]

Originally Posted by davonafairlane

Could you calculate it like a rectangle/square and divide by 2. Length*width then divide by two? Two equal right angle triangles placed on each other would be a square or rectangle depending on triangle shape? Do you know what I mean?

That only works for a right angle triangle...

[thefargo]

Originally Posted by 4Vman

That only works for a right angle triangle...

yeah, he said he had a right angled triangle.
for non right angled triangle he would be using the sine area rule

area = 1/2 a x b sin c

where c is the angle between the 2 sides a and b
a and b are both lengths.

[EgoFG]

Originally Posted by thefargo

yeah, he said he had a right angled triangle.

But, Alas, he does not

[XR06T]

Originally Posted by EgoFG

But, Alas, he does not

bingo, those dimensions do not make a right angled triangle.

and the formula is 1/2 base x PERPENDICULAR height.

[R0BD0G]

ahh. makes sence dont it. thanks

[davonafairlane]

I did YR12 in 2004 I don't remember all the rules or anything strange like that but the logic makes sense, glad to help. Trigonometry was my favourite maths section though, sad as that may sound.

David

[NC1183]

Area of a triangle is A = 1/2BxH

ie. A - Area
B - Base
H - Height

[R0BD0G]

i do prevocational math a.....whats trigonometry

[troppo]

1/2 base length X height for a right angle triangle area (1/2 a rectangle)

[BabyJ]

Originally Posted by Kermit 73

i have a right angle triangle 6 x 6.2 x 8.8.
whats the rule for working it out??

Originally Posted by 4Vman

That only works for a right angle triangle...

: :

[4Vman]

Originally Posted by BabyJ

: :

good point! :

[BabyJ]

Originally Posted by 4Vman

good point! :

Your welcome!

[Yellow_Festiva]

The correct rule as mentioned already is BASE X HEIGHT divided by 2.

It works for ANY and ALL triangles, as long as the height measurement is at right angles to the base (but the triangle does not have to be a right angled triangle)

[Jesk]

Originally Posted by Yellow_Festiva

The correct rule as mentioned already is BASE X HEIGHT divided by 2.

It works for ANY and ALL triangles, as long as the height measurement is at right angles to the base (but the triangle does not have to be a right angled triangle)

correctimondo!!!!

yeah you can use your sine rule for getting area, but why when you can do it so much simpler

[Russ]

Just use a bigger hammer !!!!

[uranium_death]

Half base X height...

Good old maths..fave topic at school...

I never reached any great heights (does it show), but I still enjoyed it

Still miss learning about maths too.

[XW_GS]

Another complex triangle / mathematical problem that i solved recently

[xbgs351]

Isn't this primary school maths?

Q. What is the area of a rectangle?
A. = Length x width

Q. What is a right angle triangle?
A. = 1/2 a rectangle

[Grechie]

I went well in maths till yr 10 then i gave it up, now i dont remember a thing!

I wish i kept it up now

[DJL351]

Q1.)
If BP 98 cost 169.9c/L and I own a mondern V8 with a 68L tank,

A) How much will it cost to fill from empty?
B) How many banks will knock me back for a loan to fill said tank?

Given you have found the answers to Q1 A&B;
Q2.) If one of my kindeys is worth $20,000 on the black market;

A) How many tanks of fuel will in buy?
B) Will K-Rudd's Butler manage to throw a 'Casey' style party at the PM's house

[IH8HSV]

Originally Posted by DJL351

Q1.)
If BP 98 cost 169.9c/L and I own a mondern V8 with a 68L tank,

A) How much will it cost to fill from empty?
B) How many banks will knock me back for a loan to fill said tank?

Given you have found the answers to Q1 A&B;
Q2.) If one of my kindeys is worth $20,000 on the black market;

A) How many tanks of fuel will in buy?
B) Will K-Rudd's Butler manage to throw a 'Casey' style party at the PM's house

Well done!

[tetgreg888]

stop It I`m Getting A Head Ache !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!![u]