The points A,B,C and D are consecutive vertices of a regular polygon with 20 sides. Calculate b) ACD

Question

The question is from the chp angle properties of polygons. Basically u just hv to explain how do we find the angle C pls tell in detailed method pls help

Answer 1

Draw and label a diagram!!

Each interior angle = 18(180)/20, that 162°

AC creates isosceles triangle ABC.

∠BCA = 9°

∠ACD = ∠BCD - 9°

 

Can you complete and answer?