Answer is A. 18
Because n + 18 =2n
To find the exterior angle measure we would use the following formula:

A regular hexagon has 6 sides so we divide:
360/6 which equals 60
So our final answer would be A. 60
Answer:
D
Step-by-step explanation:
X=56°
Because cos =90- sin
Answer: 55% are girls,45% are boys, number of girls is 122% of the boys,number of boys is 81.8%
Step-by-step explanation: percentage of girls = number of girls ÷ total population × 100
= (198/360)× 100 = 55%
Number of boys = 360 -198 = 162
Percentage of boys = (162/360) × 100 = 45%
Percentage of girls to boys = (198/162) × 100 = 122%
Percentage of boys to girls = (162/198) × 100 = 81.8%