1. Geometry Drill 12/19/14
Which postulate, if any, can be used to
prove the triangles congruent?
1. 2.
Put All HW and a Pen on the corner of your desk

2. 4.

3. Geometry Drill
Write down the name of the figure described.
Only 1 figure. I will keep giving hints
Hint 1 : I am a special polygon
Hint 2: I have three sides
Hint 3: I have an angle that is neither obtuse
or acute
Hint 4: My sides have a special relationship
Right Triangle

4. Geometry Objective
• STW continue to prove
triangle congruent

5. 4-4 Practice A

7. Statement Reason
DEAB .1
DFAC .2
DA .3
DEFABC .4

8. DEAB .1
DFAC .2
DA .3
DEFABC .4

9. Statement Reason
EFBC .1
EB .2
FC .3
DEFABC .4

10. Statement Reason
ADBC
BDAB

.1
ADBC 

11. Statement Reason
ASA or AAS
ECAC
EDAB

//.1
EDCABC .5

12. Statement Reason
1. Given
SRTQRP .5

13. Statement Reason
1. Given

14. VOCABULARY
• HYPOTENUSE
• LEGS
• D IS A RIGHT ANGLE
• FE IS CALLED THE
___?_______
• DF & DE ARE CALLED
____?____
F
D
E

15. Given: AB || DC; DC  AB
Prove: ∆ABC  ∆ CDA
D C
A B

16. Proof
Statement
•
• AC  AC
• < BAC  _______
• ∆ABC  ∆CDA
Reason
• Given
• ____________
• If _________
____________
• ____________

17. Given: RS ST; TU ST; V is the midpoint
of ST
Prove: ∆RSV  ∆ UTV
R S
T
U
V
 

18. Proof
Statement Reason

19. AAS THEOREM
If two angles and a non-included
side of one triangle are
congruent to two angles and a
non-included side of another
triangle then the triangles are
congruent.

20. GT Geometry
Given:
Prove:
A
B
C
D
E
F
FEDECBAB  ; ACFDFEAB  ;
FEDABC 

21. Pythagorean Theorem
a
b
c

22. Pythagorean Theorem
a
b
c a2
+ b2
= c2

23. HLTHEOREM
If the hypotenuse and a leg of
one right triangle are congruent
to the hypotenuse and a leg of
another right triangle , then the
triangles are congruent.