bi(two)...sector(section). Bisector cuts the segment into two equal sections.
BC = CD <em>definition of perpendicular bisector</em>
BC + CD = BD <em>segment addition postulate</em>
CD + CD = BD <em>substitution</em>
2CD = BD <em>added like terms</em>
2CD = 16 <em>substitution</em>
CD = 8 <em>division property of equality</em>
CD = y + 3 <em>given per graph</em>
y + 3 = 8 <em>transitive property</em>
y = 5 <em>subtraction property</em>
Answer: 5
Answers:
1. 1
2. 2
3. 4
4. 1
//Hope this helps. Look the image for better understanding.
If you find a first you will be able to find b a little faster then it is super easy after that you got this!
Take the length of one of the sides and times that by the radius. Divide that answer by 2. Now take that and multiply by the number of sides the polygon has. If you can't find the radius or side, you're going to have to use tan, sin, or cos.
