Search All of the Math Forum:

Views expressed in these public forums are not endorsed by NCTM or The Math Forum.

Notice: We are no longer accepting new posts, but the forums will continue to be readable.

Topic: Why can I draw a triangle with two 90 degree angles and one 0 degree angle?
Replies: 8   Last Post: Jul 26, 2010 2:28 PM

 Messages: [ Previous | Next ]
 adam sageripious Posts: 14 Registered: 12/2/05
Re: Why can I draw a triangle with two 90 degree angles and one 0 degree angle?
Posted: Oct 15, 2009 9:33 AM

hello there.

ahh yes, lets break this down and see.
A)
TAN = x/y
if Y is an arbitrary 1 value, and x=INFINITE
then tan INF/1 = INF
Lets check Z
SIN = X/z
well z>X, so sin is a fraction. but x is inf, so weird
COS = y/z, y must approach 1/INF, which is zero.
however cos90 is 0, so y=0, or if it doesnt, then y has value, but z is INF.
in any case, you got two legs which are very weird.

Side note and imagination time. Triangle with 3 90 degree angles... thought i would pop this in for those who never realized this. you can take a triangle but when its laid out on 2D paper, it has properties... but, if that paper,m begins to twist and curl, and bulge, and you draw as if you never knew the paper was of this sort. Almost as if you are on the paper drawing the triangle, but to you its all flat. but outisde the paper its very 3D.

So here we go, make on point, walk out a bit, make another point, turn a bit, walk out, and make another point, and come back, you have your triangle. now, imagine as if your walk, was in reality over a sphere.

take a spherical shape, make a point on in, we call that mexico, now, make anoter point directly easta certain amount, go about 1/4th the way around the sphere. stop. Now draw a line up towards the north pole. when you get there, draw back towards mexico.
If you look from top down to each POINT, the directions are all 90 degrees, but yet you only have a 3 sided figure which is closed.
check it OUT, WORLD POINTS, geomoetry has a new complexity for you to explore.

Date Subject Author
10/14/09 TobalJackson
10/14/09 Narcoleptic Insomniac
10/14/09 TobalJackson
11/22/09 HallsofIvy