delta angle

Also called: delta, central angle

The angle the curve sweeps at the circle’s center.

The central angle subtended by the curve — the amount of turn between entering and leaving it. Delta, radius, and arc length are locked together: any two of the three determine the third, which is how an under-specified curve on a deed can still be solved.

Where you'll see it

Surveying Basics

How to Read a Metes and Bounds Description

Deeds are written in their own language. Here is how to walk one line by line — and what the closure math is actually telling you at the end.

Related terms in Curves

arc length chord concave curve radius tangent

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