Simple maths question

dowie · 11 Jan 2009 at 20:54

mattheman said:
SO YOUR TELLING ME the you have the base length and the angle, you cannot draw it? as the angle on the right matches the angle on the left, draw a line on each side till they cross measure line.

Do you not think it might be quicker, easier and a bit more accurate to simple calculate it?

big_white_dog84 · 11 Jan 2009 at 21:10

If it's right angled use 'soh cah toa'?

big_white_dog84 · 11 Jan 2009 at 21:13

cosine 80 = 10/z

z = 10 / cosine 80 = 57.59
???

DUNDOIT · 11 Jan 2009 at 21:29

Scale drawing is a fine way to do it.

SpaghettiOs · 11 Jan 2009 at 21:31

It's impossible for it to be right angled if two angles are the same, in which case SohCahToa doesn't work. You have to use the Cosine and Sine Rules.

mattheman · 11 Jan 2009 at 21:32

Sinque said:
Hahahahahah, measure the line - quality. Have you even gone through secondary education?

i looks like a isosceles triangle, two equal sides two equal angles = draw.
simple

GeForce · 11 Jan 2009 at 21:37

gamer_boy said:
It's impossible for it to be right angled if two angles are the same, in which case SohCahToa doesn't work. You have to use the Cosine and Sine Rules.

You can just split the triangle down the middle to make two right angled ones.

See my post above

unclebob123 · 28 Jan 2009 at 00:46

Sorry to dig up this old thread but I have one more question. Say we know X and Z in said triangle how do we work out Y?

clv101 · 28 Jan 2009 at 00:50

y = Cos-1(0.5X/Z)

thepeganator · 28 Jan 2009 at 01:03

gamer_boy said:
It's impossible for it to be right angled if two angles are the same, in which case SohCahToa doesn't work. You have to use the Cosine and Sine Rules.

90, 45 and 45??

Duhh...

WantoN · 28 Jan 2009 at 01:08

I love it.

Throw some basic trigonometry to the geeks and watch them squabble over it. It's like bum fights for the socially challenged

Ant

unclebob123 · 28 Jan 2009 at 01:37

cheers clv101

.one. · 28 Jan 2009 at 01:53

WantoN said:
I love it.

Throw some basic trigonometry to the geeks and watch them squabble over it. It's like bum fights for the socially challenged

Ant

LOL your post made my day.

thepeganator · 28 Jan 2009 at 12:15

.one. said:
LOL your post made my day.

You must have had a pretty crap day.