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Hon Geom Drill #2.03 11/11/14 
 Use the picture and locate all the 
corresponding angles, same side interior 
angles, alternate interior angles, and alternate 
exterior angles 
1 2 
3 
4 
5 
7 
6 
8
Hon Geom Drill #2.03 11/11/14 
 Name all angles that must be congruent to 
angle 2 
1 2 
3 
4 
5 
7 
6 
8
Find the value of x or y 
 61 
 x
Find the value of x or y 
 60 
 x
Write the converse 
 If two lines are 
perpendicular to the same 
line, then the two lines are 
parallel
State the Postulate or theorem that 
justifies each statement 
1.m4m6 180 
2.k  p
1. In the diagram of movie 
theater seats, the incline of 
the floor, f, is parallel to the 
seats, s. If m1  68°, what is x?
2. In the diagram, roads a 
and b are parallel. 
What is the measure of PQR?
In the diagram of the gate, 
the horizontal bars 
are parallel and the vertical 
bars are parallel. 
Find x and y. 
3. x= 
4. y=
Use the diagram of a staircase railing for Exercises 4 and 5. 
AD || FJ. AG ||CJ 
and Choose the best answer. 
4.Which is a true statement 
about the measure of DCJ? 
A It equals 30°, by the Alternate 
Interior Angles Theorem. 
B It equals 30°, by the 
Corresponding Angles Postulate. 
C It equals 50°, by the Alternate 
Interior Angles Theorem 
D It equals 50°, by the 
Corresponding Angles Postulate.
5. Which is a true statement 
about the value of n? 
F It equals 25°, by the 
Alternate Interior Angles Theorem. 
G It equals 25°, by the 
Same-Side Interior Angles 
Theorem. 
H It equals 35°, by the 
Alternate Interior Angles Theorem. 
J It equals 35°, by the 
Same-Side Interior Angles 
Theorem.
Are These Lines Parallel? 
t 
a 
40º 140º b
Are These Lines 
Parallel? 
40º 
t 
a 
140º b
Are These Lines 
Parallel? 
80º 
t 
a 
80º b
Are These Lines 
Parallel? 
t 
a 
b 
70º 
70º
Yes or No!! 
Are the converses of the 
corresponding angles 
postulate, alternate int. angles 
thm, alt. Ext. angles thm and 
same side interior angles thm 
true?
Yes or No!! 
Are the converses of the 
corresponding angles postulate, 
alternate int. angles thm, alt. 
Ext. angles thm and same side 
interior angles thm true?
OBJECTIVE 
To PROVE THAT 
LINES ARE 
PARALLEL.
Converse of the Corresponding 
Angle post 
If two lines are cut by a 
transversal such that 
corresponding angles are 
congruent, then two lines 
are parallel.
Converse of the Alternate 
Interior Angle Theorem 
If two lines are cut by a 
transversal such that 
alternate interior angles 
are congruent, then the 
lines are parallel.
Converse of the Same Side 
Interior Angle Theorem 
If two lines are cut by a 
transversal such that same 
side interior angles are 
supplementary, then the 
lines are parallel.
STATE EARLIER THEOREM 
t 
a 
b
THEOREM 
If two lines are 
perpendicular to the same 
line, then the lines are 
parallel to each other.
NEW THEOREM 
If a || b 
and 
a || c, 
then?????????
THEOREM 
If two lines are parallel 
to the same line, then 
the lines are parallel 
to each other.
Conclusions 
 1) State the converses 
 2) If two lines are 
perpendicular to the same 
line then… 
 3) If two lines are parallel 
to the same line then...

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Find Angles and Parallel Lines in Geometry Problems

  • 1. Hon Geom Drill #2.03 11/11/14  Use the picture and locate all the corresponding angles, same side interior angles, alternate interior angles, and alternate exterior angles 1 2 3 4 5 7 6 8
  • 2. Hon Geom Drill #2.03 11/11/14  Name all angles that must be congruent to angle 2 1 2 3 4 5 7 6 8
  • 3. Find the value of x or y  61  x
  • 4. Find the value of x or y  60  x
  • 5. Write the converse  If two lines are perpendicular to the same line, then the two lines are parallel
  • 6. State the Postulate or theorem that justifies each statement 1.m4m6 180 2.k  p
  • 7. 1. In the diagram of movie theater seats, the incline of the floor, f, is parallel to the seats, s. If m1  68°, what is x?
  • 8. 2. In the diagram, roads a and b are parallel. What is the measure of PQR?
  • 9. In the diagram of the gate, the horizontal bars are parallel and the vertical bars are parallel. Find x and y. 3. x= 4. y=
  • 10. Use the diagram of a staircase railing for Exercises 4 and 5. AD || FJ. AG ||CJ and Choose the best answer. 4.Which is a true statement about the measure of DCJ? A It equals 30°, by the Alternate Interior Angles Theorem. B It equals 30°, by the Corresponding Angles Postulate. C It equals 50°, by the Alternate Interior Angles Theorem D It equals 50°, by the Corresponding Angles Postulate.
  • 11. 5. Which is a true statement about the value of n? F It equals 25°, by the Alternate Interior Angles Theorem. G It equals 25°, by the Same-Side Interior Angles Theorem. H It equals 35°, by the Alternate Interior Angles Theorem. J It equals 35°, by the Same-Side Interior Angles Theorem.
  • 12. Are These Lines Parallel? t a 40º 140º b
  • 13. Are These Lines Parallel? 40º t a 140º b
  • 14. Are These Lines Parallel? 80º t a 80º b
  • 15. Are These Lines Parallel? t a b 70º 70º
  • 16. Yes or No!! Are the converses of the corresponding angles postulate, alternate int. angles thm, alt. Ext. angles thm and same side interior angles thm true?
  • 17. Yes or No!! Are the converses of the corresponding angles postulate, alternate int. angles thm, alt. Ext. angles thm and same side interior angles thm true?
  • 18. OBJECTIVE To PROVE THAT LINES ARE PARALLEL.
  • 19. Converse of the Corresponding Angle post If two lines are cut by a transversal such that corresponding angles are congruent, then two lines are parallel.
  • 20. Converse of the Alternate Interior Angle Theorem If two lines are cut by a transversal such that alternate interior angles are congruent, then the lines are parallel.
  • 21. Converse of the Same Side Interior Angle Theorem If two lines are cut by a transversal such that same side interior angles are supplementary, then the lines are parallel.
  • 23. THEOREM If two lines are perpendicular to the same line, then the lines are parallel to each other.
  • 24. NEW THEOREM If a || b and a || c, then?????????
  • 25. THEOREM If two lines are parallel to the same line, then the lines are parallel to each other.
  • 26. Conclusions  1) State the converses  2) If two lines are perpendicular to the same line then…  3) If two lines are parallel to the same line then...