Question

pls answer this question

Answer 1

1.
angle a equals to angle gdb ...90° each
angle agf equals to angle gbd ... corresponding angles gf || BC
triangle agf is similar to triangle dbg...A.A. postulate

2. angle a=angle e. 90° each
angle afg = angle fce. corresponding angles
triangle agf ~ triangle efc. aa postulate
3. triangle agf~triangle dbg
triangle agf ~ triangle efc
therefore triangle dbg ~ triangle efc