If you're laying out a large radius arc in a confined area and can't reach the center of the circle, enter arc dimensions below to find lay-out points in the curve. Also see Printable Arc Templates to create printable paper templates for smaller arcs.
Inside Arc (right side bottom of diagram)
Outside Arc (left side top of diagram)
The smaller the increments, the more accurate (and smooth) the arc line will be.
Mark the base 'chord' line and increments from centre outwards, and measure 90 ° to the arc points to form the arc.
To make sure the measured points are square off the base line, mark another line parallel to the base line (above or below), square a line through the center, mark corresponding increments and line through both increment marks to mark the arc points.
To fine tune Slider Controls click to select and use ◄ ► (cursor) keyboard keys.
Open new window containing only diagram images in current page ↓ This will better fit printed page. Printing to Scale Help
Your iPad, iPhone or Android Tablet or Phone is a valuable On-Site tool!
Lay your phone or tablet on an angled surface (roof ?) to directly measure angles and automatically calculate Roofing and Pitch Angle Apps.
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Questions or Suggestions? ph: +61 7 40987645
ALWAYS CHECK WITH YOUR LOCAL BUILDING AUTHORITY BEFORE LAYING OUT OR BUILDING ANYTHING
AND FOLLOW ALL LOCAL CODES. VERIFY ALL DIMENSIONS AND ANGLES BEFORE CONSTRUCTION
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