I guess 26 first question ...
(X-x0)m=y-y0
(X-5)2=y-9
2x-10=y-9
2x-1=y
Substitute (r,3) in the equation
2(r)-1=3
2r=4
R=2
4 +- √16 - 4(2)(1) / 4 --> 4 +- √8 / 4 --> 4 +- 2√2 / 4 --> 2 +- √2/2
Ans: 2 + √2/2 and 2 - √2/2
Answer:
389.1 units² (nearest tenth)
Step-by-step explanation:
<u>Regular polygon</u>: all side lengths are equal, all interior angles are equal.
<u>Apothem</u>: a line drawn from the center of any polygon to the midpoint of one of the sides
<u>Radius</u>: a line drawn from the center of the polygon to a vertex.
Therefore, we have been given the apothem of this regular dodecagon.
<h3><u>Formulae</u></h3>

where:
- n = number of sides
- l = length of one side
- a = apothem (the line drawn from the center of any polygon to the midpoint of one of the sides)

where:
- l = length of one side
- n = number of sides
<h3><u>Solution</u></h3>
First, calculate the length of one side of the regular dodecagon by substituting a = 11 and n = 12 into the apothem formula:



Now substitute n = 12, the found value of l, and a = 11 into the area formula:


