Answer:
9
Step-by-step explanation:
The exterior angle is equal to the sum of the 2 opposite interior angles, therefore:
9x + 9 = 45 × 5x
4x = 36
x = 9
Answer:
The measure of angle B is 50
Step-by-step explanation:
Answer:
Step-by-step explanation:
1.4% of b = 
8% of x = 

Explanation:
Area is pi×r^2 and you times it by the fraction of the circle you have as its not a full circle.