Me out

1.what is the measure of the missing angle? (first image)

81°
84°
87°
90°

2.

find the value of x.
(second image)
133°
135°
137°
139°

3.

how many triangles can a heptagon be divided into?
3
4
5
6

4.

if a pentagon is a regular pentagon, then what is the measure of each interior angle?
108°
36°
144°
72°

5.

which polygon has interior angles whose sum is 1440°?
octagon
nonagon
decagon
11-gon

6.

if m∠c = 147°, determine m∠e.
(third image)
147°
57°
33°
180°

7.

an interior angle and an exterior angle are adjacent. the exterior angle measures 113°. what is the measure of the interior angle?
67°
77°
63°
73°

8.
(forth image)
find the measure of y in the drawing.

51°
129°
61°
139°

9.for the following diagram, assume that l || m
(fifth image)

solve for each of the variables, x and y. for each solution, explain, in complete sentences which special angles allowed you to create an equation in order to find the solution.