Answer:
The arc length of the semicircle is half the circumference of the full circle
I believe with vertical angles, they are equal to each other.
Therefore,
2y + 5 = 4y
subtract 2y from both sides
5 = 2y
divide 2 from both sides
y = 5/2
Explanation is in the file
tinyurl.com/wpazsebu
Answer:
x=45
Step-by-step explanation:
You should follow the formula:
3x+3x+x+x=360
8x=360
x=45