question_answer

    In figure, find the value of x. Or In figure, ABCDE is a regular pentagon. Find the relation between a, b and c, given  

Answer:

    (1) [ exterior angle is equal to the sum of interior opposite angles] Similarly, is exterior to and       (1) OR  is a regular pentagon.                      is a regular pentagon and angles opposite to equal sides are also equal] In                                                                           (1) In                     [for regular pentagon] And [in regular pentagon all sides are equal] [given, in a triangle, angles opposite to equal sides are also equal]                             [in a triangle sum of all angles is ]                                                      (1)