Question

find the unknown angle marked here also explain step by step that I can write in my fair copy ​

Answer 1

Step-by-step explanation:

1.angle FGB=180-140(linear pair)

=40°

2.in ∆FGB(angle sum property of a triangle)

angle FBG+25+40=180

angle FBG=115°

3.angle BFG=angle CFE=25°(vertically opposite angles)

4.in ∆CFE(angle sin property of a triangle)

angle ECF+45+25=180

angle ECF=110°