1. #3.03 Drill 2/3/15
Use the diagram for Items 1–2.
1. Given that mABD = 16°, find mABC.
2. Given that mABD = (2x + 12)° and mCBD =
(6x – 18)°, find mABC.
32°
54°
65
8.6
Use the diagram for Items 3–4.
3. Given that FH is the perpendicular bisector of
EG, EF = 4y – 3, and FG = 6y – 37, find FG.
4. Given that EF = 10.6, EH = 4.3, and FG = 10.6,
find EG.
Put HW and Pen on corner of
your desk

2. Objective
• STW continue to work with
perpendicular bisectors and
angle bisectors
• STW review past information
including some SAT strategies

7. 𝑚∠1 + 𝑚∠11 + 𝑚∠14 = 180°
Why?

8. Why?
𝑚∠3 + 𝑚∠5 = 180°

9. Why?
𝑚∠11 = 𝑚∠13

10. Why?
𝑚∠14 + 𝑚∠9 = 180°

11. Statement Reasons
A
B
D
C
E

12. DEAE 
DEBAEC 
BCDA  ,
DEBAEC  BDAC 
E is the midpoint of 𝐴𝐷, 𝐴𝐶 ∥ 𝐵𝐷
Def of a Midpoint VA thrm
AIA thrm
AAS/ASA
CPCTC