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Orthogonality - Wikipedia

en.wikipedia.org/wiki/Orthogonality

The line segments AB and CD are orthogonal to each other. In mathematics, orthogonality is the relation of two lines at right angles to one another ...

Perspective Drawing - One Point Perspective

www.artyfactory.com/perspective_drawing/perspective_3.html

There are two types of construction lines used in this perspective drawing: 1) ORTHOGONAL LINES which we have drawn in RED. 2) TRANSVERSAL LINES  ...

Orthogonal Lines -- from Wolfram MathWorld

mathworld.wolfram.com/OrthogonalLines.html

Orthogonal Lines. Two or more lines or line segments which are perpendicular are said to be orthogonal. ... CITE THIS AS: Weisstein, Eric W. "Orthogonal Lines.

Understanding Orthogonal and Transversal Line in Art

drawsketch.about.com/od/drawingglossary/g/orthogonal.htm

Jan 11, 2017 ... Artists talk about 'orthogonal lines' as these are key to drawing with correct perspective. Explore orthogonal and transversal lines with an easy ...

orthogonal lines Definition - Creative Glossary

www.creativeglossary.com/art-perspective/orthogonal-lines.html

Definition of orthogonal lines at CreativeGlossary.com.

Orthogonal Lines - Drawing in One-Point Perspective - Harold Olejarz

www.olejarz.com/arted/perspective/yorth.html

Drawing in One-Point Perspective is a step-by-step guide to one-point perspectie drawing. Created by Harold Olejarz, the site demonstrates how to draw a ...

Perpendicular Lines 1 | Coolmath.com

www.coolmath.com/algebra/08-lines/14-perpendicular-lines-01

Let's graph these lines: * I'm using y = mx + b stuff to graph them!

Orthogonal Lines, Condition for Two Lines to be Orthogonal | Math ...

math.tutorvista.com/geometry/orthogonal-lines.html

When two lines intersect at right angles to each other, they are said to be orthogonal. If the slope of the first line is m1 and the slope of the second line is m 2, then ...

Slope: Parallel and Perpendicular Lines - Purplemath

www.purplemath.com/modules/slope2.htm

Parallel lines and their slopes are easy. Since slope is a measure of the angle of a line from the horizontal, and since parallel lines must have the same angle, ...

Perpendicular lines. (Coordinate Geometry) - Math Open Reference

www.mathopenref.com/coordperpendicular.html

When two lines are perpendicular to each other (at right angles or 90°), their slopes have a particular relationship to each other. If the slope of one line is m then ...