Problem:Legal Descriptions: Describing Curves

Problem: Legal Descriptions: Describing Curves

The elements of a plane circular curve include its length, radius, tangent, and central (delta) angle. How many of these elements are needed to define a unique curve?
(A) One
(B) Any two
(C) Any three
(D) All four
This is problem 46(7-29) from the new second edition of 1001 Solved Surveying Problems by Jan Van Sickle. Reprinted with permission from 1001 Solved Surveying Problems by Jan Van Sickle (1997, 728 pp., Professional Publications Inc.). For details on this and other FLS exam-prep books, call 800/426-1178 or visit .

Answer: B

Any two of the elements given will describe a unique curve. Frequently, three elements are given, but two are adequate.