Question

the side ef, fd and de of a def are produced in order forming three exterior angles dfp, edq and fer respectively. Prove that dfp + edq +fer =3600

Answer 1

1+2+3=180 where 1,2,3 are interior angle

now replace 1,2,3 by (180-DFP)+(180-EDQ)+(180-FER)=180 NOW u will get DFP+EDQ+FER=360

Answer 2

Answer :

The file attached below is the answer for your question