SOLUTION: AB, BC and CD are three sides of a regular polygon , angle ABC= 144°, AB and CD are produced to meet at E. Find the number of sides of the polygon and angle BAC ?

Algebra ->  Polygons -> SOLUTION: AB, BC and CD are three sides of a regular polygon , angle ABC= 144°, AB and CD are produced to meet at E. Find the number of sides of the polygon and angle BAC ?      Log On


   

Question 1067337: AB, BC and CD are three sides of a regular polygon , angle ABC= 144°, AB and CD are produced to meet at E. Find the number of sides of the polygon and angle BAC ?
Answer by ikleyn(52794) About Me  (Show Source):
You can put this solution on YOUR website!
.
Answer. 10-sided regular polygon (decagon).


Notice. The part of the condition "AB and CD are produced to meet at E." is unnecessary, excessive, and is not used in the solution.

This part is IRRELEVANT to the solution (and to the condition, too).