Drawing+methods

Drawing Methods
I will stick to Stellenbosch University standards on my website. Most of the documentation might be in your handbooks already.

It is said that 95% of errors in any human endeavor result from poor communication. In our business, the engineering drawing is our language of communication. Even with the Solids CAD revolution currently making its mark in engineering, the good old 2D engineering drawing still remains the workhorse of the industry. So, you can save your breath describing a widget over the phone.

The medium is less important than the quality of information conveyed. So whether it is presented as a pencil sketch on a scrap of paper, or as a sharp looking CAD printout, it still requires the following elements:

First Term

 * Page Format, line sizes and text/value rules
 * Constructions of tangent lines
 * Ellipse
 * Projections of objects, 1st and 3rd angle Drawing layout
 * Full section
 * Dimensioning
 * Isometric drawings; Scale
 * Auxiliary views
 * Concept of projection planes,
 * Projections of points in any quadrant
 * new projection planes
 * Projections of lines
 * trace points
 * true lengths
 * True angles of a line
 * Shortest distance between lines
 * True shape of a triangle by projection
 * Interpenetration between two triangles

Second Term

 * Planes, trace lines, new projection plane trace line; Constructions using the properties of trace lines
 * True angles between lines and planes, true angles between planes.
 * Interpenetration of bodies (such as pyramids, cylinders, cones, prisms, spheres) with section planes perpendicular to a projection plane
 * Shadows


 * Additional Notes**

 Constructions pages on this site **

**Lines**

 * [|Introduction to constructions]
 * [|List of printable constructions worksheets]
 * [|Copy a line segment]
 * [|Parallel line through a point]
 * [|Perpendicular bisector of a line segment]
 * [|Perpendicular from a line at a point]
 * [|Perpendicular from a line through a point]
 * [|Perpendicular from endpoint of a ray]
 * [|Divide a segment into n equal parts]

**Angles**

 * [|Bisecting an angle]
 * [|Copy an angle]
 * [|Construct a 30° angle]
 * [|Construct a 45° angle]
 * <span style="color: #225599; list-style-type: none; margin-bottom: 10px; margin-left: 0px; margin-top: 2px; padding-left: 0px; padding-right: 10px; text-decoration: none; white-space: nowrap;">[|Construct a 60° angle]
 * <span style="color: #225599; list-style-type: none; margin-bottom: 10px; margin-left: 0px; margin-top: 2px; padding-left: 0px; padding-right: 10px; text-decoration: none; white-space: nowrap;">[|Construct a 90° angle (right angle)]
 * <span style="color: #225599; list-style-type: none; margin-bottom: 10px; margin-left: 0px; margin-top: 2px; padding-left: 0px; padding-right: 10px; text-decoration: none; white-space: nowrap;">[|Constructing 75° 105° 120° 135° 150° angles and more]

<span style="color: #114466; font-size: 13px; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 12px;">**Triangles**

 * <span style="color: #225599; list-style-type: none; margin-bottom: 10px; margin-left: 0px; margin-top: 2px; padding-left: 0px; padding-right: 10px; text-decoration: none; white-space: nowrap;">[|Copy a triangle]
 * <span style="color: #225599; list-style-type: none; margin-bottom: 10px; margin-left: 0px; margin-top: 2px; padding-left: 0px; padding-right: 10px; text-decoration: none; white-space: nowrap;">[|Isosceles triangle, given base and side]
 * <span style="color: #225599; list-style-type: none; margin-bottom: 10px; margin-left: 0px; margin-top: 2px; padding-left: 0px; padding-right: 10px; text-decoration: none; white-space: nowrap;">[|Isosceles triangle, given base and altitude]
 * <span style="color: #225599; list-style-type: none; margin-bottom: 10px; margin-left: 0px; margin-top: 2px; padding-left: 0px; padding-right: 10px; text-decoration: none; white-space: nowrap;">[|Equilateral triangle]
 * <span style="color: #225599; list-style-type: none; margin-bottom: 10px; margin-left: 0px; margin-top: 2px; padding-left: 0px; padding-right: 10px; text-decoration: none; white-space: nowrap;">[|Triangle medians]
 * <span style="color: #225599; list-style-type: none; margin-bottom: 10px; margin-left: 0px; margin-top: 2px; padding-left: 0px; padding-right: 10px; text-decoration: none; white-space: nowrap;">[|30-60-90 triangle, given the hypotenuse]
 * <span style="color: #225599; list-style-type: none; margin-bottom: 10px; margin-left: 0px; margin-top: 2px; padding-left: 0px; padding-right: 10px; text-decoration: none; white-space: nowrap;">[|Triangle, given 3 sides (sss)]
 * <span style="color: #225599; list-style-type: none; margin-bottom: 10px; margin-left: 0px; margin-top: 2px; padding-left: 0px; padding-right: 10px; text-decoration: none; white-space: nowrap;">[|Triangle, given one side and adjacent angles (asa)]
 * <span style="color: #225599; list-style-type: none; margin-bottom: 10px; margin-left: 0px; margin-top: 2px; padding-left: 0px; padding-right: 10px; text-decoration: none; white-space: nowrap;">[|Triangle, given two sides and included angle (sas)]
 * <span style="color: #225599; list-style-type: none; margin-bottom: 10px; margin-left: 0px; margin-top: 2px; padding-left: 0px; padding-right: 10px; text-decoration: none; white-space: nowrap;">[|Incircle of a triangle]
 * <span style="color: #225599; list-style-type: none; margin-bottom: 10px; margin-left: 0px; margin-top: 2px; padding-left: 0px; padding-right: 10px; text-decoration: none; white-space: nowrap;">[|Circumcircle of a triangle]

<span style="color: #114466; font-size: 13px; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 12px;">**Triangle Centers**

 * <span style="color: #225599; list-style-type: none; margin-bottom: 10px; margin-left: 0px; margin-top: 2px; padding-left: 0px; padding-right: 10px; text-decoration: none; white-space: nowrap;">[|Triangle incenter]
 * <span style="color: #225599; list-style-type: none; margin-bottom: 10px; margin-left: 0px; margin-top: 2px; padding-left: 0px; padding-right: 10px; text-decoration: none; white-space: nowrap;">[|Triangle circumcenter]
 * <span style="color: #225599; list-style-type: none; margin-bottom: 10px; margin-left: 0px; margin-top: 2px; padding-left: 0px; padding-right: 10px; text-decoration: none; white-space: nowrap;">[|Triangle orthocenter]
 * <span style="color: #225599; list-style-type: none; margin-bottom: 10px; margin-left: 0px; margin-top: 2px; padding-left: 0px; padding-right: 10px; text-decoration: none; white-space: nowrap;">[|Triangle centroid]

<span style="color: #114466; font-size: 13px; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 12px;">**Circles, Arcs and Ellipses**

 * <span style="color: #225599; list-style-type: none; margin-bottom: 10px; margin-left: 0px; margin-top: 2px; padding-left: 0px; padding-right: 10px; text-decoration: none; white-space: nowrap;">[|Finding the center of a circle]
 * <span style="color: #225599; list-style-type: none; margin-bottom: 10px; margin-left: 0px; margin-top: 2px; padding-left: 0px; padding-right: 10px; text-decoration: none; white-space: nowrap;">[|Circle given 3 points]
 * <span style="color: #225599; list-style-type: none; margin-bottom: 10px; margin-left: 0px; margin-top: 2px; padding-left: 0px; padding-right: 10px; text-decoration: none; white-space: nowrap;">[|Tangent at a point on the circle]
 * <span style="color: #225599; list-style-type: none; margin-bottom: 10px; margin-left: 0px; margin-top: 2px; padding-left: 0px; padding-right: 10px; text-decoration: none; white-space: nowrap;">[|Tangents through an external point]
 * <span style="color: #225599; list-style-type: none; margin-bottom: 10px; margin-left: 0px; margin-top: 2px; padding-left: 0px; padding-right: 10px; text-decoration: none; white-space: nowrap;">[|Focus points of a given ellipse]

<span style="color: #114466; font-size: 13px; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 12px;">**Polygons**

 * <span style="color: #225599; list-style-type: none; margin-bottom: 10px; margin-left: 0px; margin-top: 2px; padding-left: 0px; padding-right: 10px; text-decoration: none; white-space: nowrap;">[|Hexagongiven one side]
 * <span style="color: #225599; list-style-type: none; margin-bottom: 10px; margin-left: 0px; margin-top: 2px; padding-left: 0px; padding-right: 10px; text-decoration: none; white-space: nowrap;">[|Hexagon inscribed in a given circle]
 * <span style="color: #225599; list-style-type: none; margin-bottom: 10px; margin-left: 0px; margin-top: 2px; padding-left: 0px; padding-right: 10px; text-decoration: none; white-space: nowrap;">[|Pentagon inscribed in a given circle]

<span style="color: #114466; font-size: 13px; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 12px;">**Non-Euclidean constructions**

 * <span style="color: #225599; list-style-type: none; margin-bottom: 10px; margin-left: 0px; margin-top: 2px; padding-left: 0px; padding-right: 10px; text-decoration: none; white-space: nowrap;">[|Construct an ellipse with string and pins]
 * <span style="color: #225599; list-style-type: none; margin-bottom: 10px; margin-left: 0px; margin-top: 2px; padding-left: 0px; padding-right: 10px; text-decoration: none; white-space: nowrap;">[|Find the center of a circle with any right-angled object]