8. 9.

12. ST = VW = RT = UW = √10; RS = UV = 2√5; so ΔRST ΔUVW by SSS so RST UVW by CPCTC

17. 14 24. C

18. 21 25. G

20. 26. C

27. G

36. (x, y) → (x – 3, y – 4)

37. Yes, B D, BC DC

Vert s Thm, BCA DCE

22. Yes, ΔJKM ΔLMK by SSS, so JKM LMK by CPCTC. JK║ML by Converse of Alt Int s Thm

Quadratic Equation – equation that can be written in the form

ax2 + bx + c = 0

Two ways to solve, right now.

1. Factor and set = 0

2. Quadratic formula

aacbbx

242

Given: FE = FG

18 x2 – 3x

x2 – 3x – 18 = 0

(x – 6)(x + 3) = 0

x – 6 = 0 x + 3 = 0

x = 6 x = – 3

aacbbx

242

1x2 – 3x – 18 = 01

a

– 3

b

– 18

c

)1(2)18)(1(4)3()3( 2

x 2813

x2 – 3x = 18

293

x 62

122

93

x

326

293

x