Geometric Construction ERHS Drafting Tech Mrs. Oberlin

Terminology Many of the terms and concepts from your geometry class will be used and applied to create your drawings

Centerlines Centerlines are need for all arcs and circles The help us in locate the position of holes and such in a drawing in addition to helping us interpret the drawing

Radius vs. Diameter Noted with an R Used for arcs Noted with a q Used for circles

Concentric Share the same center point

Tangent Touches a circle in only one place, weather it continues on forever or not

Inscribe VS Circumscribe