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A069976 Interior angle of a regular polygon of n sides, rounded to nearest integer. 3
60, 90, 108, 120, 129, 135, 140, 144, 147, 150, 152, 154, 156, 158, 159, 160, 161, 162, 163, 164, 164, 165, 166, 166, 167, 167, 168, 168, 168, 169, 169, 169, 170, 170, 170, 171, 171, 171, 171, 171, 172, 172, 172, 172, 172, 173, 173, 173, 173, 173, 173, 173, 173, 174 (list; graph; refs; listen; history; text; internal format)
OFFSET

3,1

REFERENCES

Alexander Koeberlein, Elementary Geometry for College Students, 2nd Edition, Houghton Mifflin Company, Boston, 1999

LINKS

Table of n, a(n) for n=3..56.

FORMULA

a(n) = round(((n-2)*180)/n).

EXAMPLE

a(5) = (3*180)/5 = 108.

a(720) = 180; the maximum value. - Robert G. Wilson v, Mar 16 2016

MATHEMATICA

f[n_] := Round[180 (n - 2)/n]; Array[f, 55, 3] (* Robert G. Wilson v, Mar 16 2016 *)

PROG

(PARI) a(n) = round((n-2)*180/n); \\ Michel Marcus, Aug 27 2013

CROSSREFS

Cf. A100659.

Sequence in context: A086975 A073461 A100659 * A110546 A267434 A048934

Adjacent sequences:  A069973 A069974 A069975 * A069977 A069978 A069979

KEYWORD

easy,nonn

AUTHOR

Kristie Smith (kristie10spud(AT)hotmail.com), Apr 30 2002

EXTENSIONS

More terms from Michel Marcus, Aug 27 2013

STATUS

approved

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Last modified June 27 19:44 EDT 2017. Contains 288790 sequences.