1. Geometric Construction
ERHS Drafting Tech
Mrs. Oberlin

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

3. 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

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

5. Concentric
Share the same center point

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

7. Inscribe VS Circumscribe