Use 30° and 60° for inclined construction lines and isometric-axis layout; use the right angle for perpendiculars. Keep a reference edge supported against your T-square or another straight guide.
Choose the angles and size you need. For a particular circle template, ask Lance for the hole dimensions before ordering.
Two geometries, different drawing lines
30° / 60° / 90°
Use the 30° or 60° relationship for inclined construction and isometric-axis directions. Register the appropriate reference edge against a straight guide; rotate the triangle to present the angle your line requires.
Use either equal 45° angle for diagonal and square-layout constructions, and the 90° corner for perpendiculars. Add a 30°/60°/90° triangle only if the work calls for those different angles.
Angle illustrations. For a particular circle-template size, ask Lance for the hole dimensions before ordering.
Build a drafting combination
A registered straight line, plus the angles you use
A T-square establishes the board-edge reference. A triangle rests against its blade to guide perpendiculars and the triangle’s stated angles. Add the second geometry only if your drawing calls for it.
Includes the selected rulers, supplied individually. Add your own drawing board, paper and pencil.
