Online Geometry theorems, problems, solutions, and related topics.
Proposed ProblemClick the figure below to see the complete problem 308.See also:Complete Problem 308Collection of Geometry ProblemsLevel: High School, SAT Prep, College geometry
By problem # 307, angle (NOC) = 20 & angle (PNO)= 30. Hence, angle (NQO) = 30 - 20 = 10 deg. QED
Reference my proof for Problem 307 the external angle of the cyclic quadrilateral COPN is 70 hence aloha = 70 - 60 = 10Sumith PeirisMoratuwaSri Lanka