Vertical angles are angles opposite each other where two lines cross
Answer:

Step-by-step explanation:
Since there are 360 degrees in a circle, we can set up the following proportion:

The answer is 108°
A regular pentagon has all its five sides equal and all five angles are also equal. Hence, the measure of each interior angle of a regular pentagon is given by the below formula. Measure of each interior angle = [(n – 2) × 180°]/n = 540°/5 = 108°.
Answer: 8/9
Step-by-step explanation:
0.8888888 = 8/9