Proposed Problem

Click the figure below to see the complete problem 308.

See also:

Complete Problem 308

Collection of Geometry Problems

Level: High School, SAT Prep, College geometry

## Monday, June 22, 2009

### Problem 308. Regular Nonagon or Enneagon, Midpoints, Side, Arc, Angle

Subscribe to:
Post Comments (Atom)

By problem # 307, angle (NOC) = 20 & angle (PNO)= 30. Hence, angle (NQO) = 30 - 20 = 10 deg. QED

ReplyDeleteReference my proof for Problem 307 the external angle of the cyclic quadrilateral COPN is 70 hence aloha = 70 - 60 = 10

ReplyDeleteSumith Peiris

Moratuwa

Sri Lanka