College Algebra & Trigonometry, 2018a

530 CHAPTER 11. THE LAW OF SINES THE LAW OF COSINES
Section 5.1(cont.)
1) Center:(0, 0) 3) Center:(3, 0)
Radius = 2 Radius = 2
5) (x − 1) 2 +(y − 2) 2 =9 7) (x +2) 2 +(y − 2) 2 =9
Center:(1, 2) Center:(−2, 2)
Radius = 3 Radius = 3
9) (x +2) 2 + y 2 =0.5 11) (x − 3) 2 +(y +2) 2 =25
Center:(−2, 0) Center:(3, −2)
Radius = √ 0.5 Radius = 5
13) (x +7.5) 2 + y 2 =56.25 15) (x − 0.5) 2 +(y +1) 2 =0.25
Center:(−7.5, 0) Center:(0.5, −1)
Radius = √ 56.25 = 7.5 Radius = 0.5
17) (x − 2.5) 2 +(y − 4.5) 2 =27 19) (x +0.5) 2 +(y − 1.5) 2 = 43
18
Center:(2.5, 4.5) Center:(−0.5, 1.5)
Radius = √ 27 Radius =
√
43
18