1. The document is a geometry drill reviewing triangle classification and congruence. It contains 9 problems identifying triangle types based on angles and sides, finding side lengths, identifying congruent parts of polygons, proving triangles congruent using midpoint and side length properties, and identifying which postulate proves triangles congruent. It concludes with an extra credit assignment to create a chapter review for additional practice.

1. GT Geometry Drill 12/12/12
Review
Classify each triangle by its angles and sides.
1. MNQ acute; equilateral
2. NQP obtuse; scalene
3. MNP acute; scalene
4. Find the side lengths of the triangle.
29; 29; 23

2. 5. ∆ABC ∆JKL and AB = 2x + 12. JK = 4x – 50.
Find x and AB. 31, 74
Given that polygon MNOP polygon QRST,
identify the congruent corresponding part.
6. NO RS
____ 3. T ____ P
7. Given: C is the midpoint of BD and AE.
A E, AB ED
Prove: ∆ABC ∆EDC

3. 7.
Statements Reasons
1. A E 1. Given
2. C is mdpt. of BD and AE 2. Given
3. AC EC; BC DC 3. Def. of mdpt.
4. AB ED 4. Given
5. ACB ECD 5. Vert. s Thm.
6. B D 6. Third s Thm.
7. ABC EDC 7. Def. of ∆s

4. 8. Show that ∆ABC ∆DBC, when x = 6.
26
ABC DBC
BC BC
AB DB
So ∆ABC ∆DBC by SAS
Which postulate, if any, can be used to prove the
triangles congruent?
9. 10.
none SSS

5. Identify the postulate or theorem that proves the
triangles congruent.
HL
ASA
SAS or SSS

6. Extra Credit
• Create a review document for all of Chapter 4,
which can include outlines, example problems
(w/separate answer key), power points, etc. . You
may work individually or as a group but your final
product must be received electronically by Tuesday
12/18/12 by 7:50 am. Please make sure the name(s)
of all people involved are a part of your electronic
copy (maybe in the header or footer of a word doc).
You want this to a good study guide that would help
yourself and other study for the Chapter 4 test on
Wednesday 12/19/11.
Good Luck – Mr. Bianco