Answer:
99°
Step-by-step explanation:
When straight lines intersect, vertical angles appear.
Vertical angles are ALWAYS equal in measure, whether the lines are parallel or not.
Answer:
54.5 
Step-by-step explanation:
divide it to one rectangle and two different triangles.
Rectangles area: (8+3)*4 = 44
triangle top: 4*3/2 = 6
triangle bottom: 3*3/2= 4.5
sum the all up: 44+6+4.5 = 54.5
don't know how to do it with π though if that's obligatory
Given that arcs NM and FM are equal, the chords will be equal too
so , NM = FM
NM = x + 40
FM = 3x
x + 40 = 3x
40 = 2x
x = 20
Hope this helps