Answer:
first graph shows the function and it's inverse
X+20+16=90
x=54
54+20+16=90
There’s a right angle and it’s marked as 90 degrees.
Answer:
tan D =
or 0.545
tan F =
or 1.833
Step-by-step explanation:
To find tangent is always 
so the opposite of angle D is line EF which is 4.8 and the adjacent side is line ED which is 8.8 so
which is
or 0.545
The opposite of angle f is line ED which is 8.8 and the adjacent is line EF which is 4.8 so
is
or 1.833