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- Objectives
- Overview
- Coordinates for 3D Cad Modeling
- Geometric Entities
- 4.1 Manually Bisecting a Line or Circular Arc
- 4.2 Drawing Tangents to Two Circles
- 4.3 Drawing an Arc Tangent to a Line or Arc and through a Point
- 4.4 Bisecting an Angle
- 4.5 Drawing a Line through a Point and Parallel to a Line
- 4.6 Drawing a Triangle with Sides Given
- 4.7 Drawing a Right Triangle with Hypotenuse and One Side Given
- 4.8 Laying Out an Angle
- 4.9 Drawing an Equilateral Triangle
- 4.10 Polygons
- 4.11 Drawing a Regular Pentagon
- 4.12 Drawing a Hexagon
- 4.13 Ellipses
- 4.14 Spline Curves
- 4.15 Geometric Relationships
- 4.16 Solid Primitives
- 4.17 Recognizing Symmetry
- 4.18 Extruded Forms
- 4.19 Revolved Forms
- 4.20 Irregular Surfaces
- 4.21 User Coordinate Systems
- 4.22 Transformations
- Key Words
- Chapter Summary
- Skills Summary
- Review Questions
- Chapter Exercises
This chapter is from the book
This chapter is from the book
This chapter is from the book
This chapter is from the book
4.1 Manually Bisecting a Line or Circular Arc
Figure 4.22a shows the given line or arc AB to be bisected.
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Step 1. From A and B draw equal arcs with their centers at the endpoints and a with radius greater than half AB.
Step 2. Join intersections D and E with a straight line to locate center C.
TIP: ACCURATE GEOMETRY WITH AUTOCAD
Using object snaps (Figure A) to locate drawing geometry, such as the midpoint of the arc shown in Figure B, is a quick and easy way to draw a line bisecting an arc or another line.
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(A) The AutoCAD Drafting Settings dialog box can be used to turn on objects snaps, a method of selecting locations on drawing geometry. (Autodesk screen shots reprinted courtesy of Autodesk Inc.)
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(B) Bisecting a Line or a Circular Arc Using AutoCAD‘s Midpoint Object Snap