1. If FG is perpendicular to AC and angle DAE = 35º, what is angle DEA?

C
Explanation:
If FG is perpendicular to AC, therefore angle ADE is 90 degrees.
It is given that angle DAE is 35 degrees,
so,
let’s say DEA is x.
all angles in a triangle always are 180 degrees.

35+90+x= 180
x=180-35-90
x= 55
Hope it’s clear! :):)