PlanetMath (more info)
 Math for the people, by the people. Sponsor PlanetMath
Encyclopedia | Requests | Forums | Docs | Wiki | Random | RSS  
Login
create new user
name:
pass:
forget your password?
Main Menu
Viewing Version 10 of 'adjacent'
[ view 'adjacent' | back to history ]

Title of object: adjacent
Canonical Name: Adjacent2
Type: Definition

Created on: 2006-06-11 18:11:52
Modified on: 2007-05-25 12:41:23

Creator: Wkbj79
Modifier: Wkbj79
Author: Wkbj79

Classification: msc:51-01
Synonyms: adjacent=adjacent side

Revision comment (for changes between this and next version):

getting rid of incorrect information

Preamble:

\usepackage{amssymb}
\usepackage{amsmath}
\usepackage{amsfonts}

\usepackage{amsthm}
\usepackage{pstricks}
Content:

Given a right triangle with an acute angle $\theta$, the side of the triangle that is \emph{adjacent} to $\theta$ is the side of the triangle that touches $\theta$ that is not the hypotenuse.

\begin{center}
\begin{pspicture}(0,-2)(4,4)
\pspolygon(0,0)(4,4)(4,0)
\rput[b](2,0){adjacent}
\rput[l](0,0){.}
\rput[a](4,4){.}
\rput[b](4,0){.}
\psarc(0,0){0.3}{0}{45}
\rput[b](0.5,0.15){$\theta$}
\end{pspicture}
\end{center}

This definition can be generalized to any triangle and any angle $\theta$: The side of the triangle that is \emph{adjacent} to $\theta$ is the shorter side of the triangle that touches $\theta$. (In the case that the two sides that touch $\theta$ are congruent, both can be considered to be adjacent to $\theta$.) This more general definition is not used as commonly as the definition for right triangles.