Question

Find x first to get bringing

Answer 1

Answer:

x= 20°

Step-by-step explanation:

First: ABC is a isosceles triangle and C^=20∘. This implies also that ΔCDB is isosceles. AB=2ACsin(10∘). Hence

CEBE=SACESABE=ACsin(10∘)ABsin(70∘)=12sin(70∘)=sin(30∘)sin(110∘).

This also implies

sin(CDE^)sin(BDE^)=SCDESBDE=CEBE=sin(30∘)sin(110∘).

Also CDB^=140∘. From here I believe that CDE^=30∘ which leads to x=20∘.