1. Monday Homework: Textbook 2. 1 Pg
Monday Homework: Textbook 2.1 Pg. 46 # 1, 2, 3, 6, 7, 8, 9, 11, 12, 15 (not unlimited checks!) & Graphing Picture
1st: Fill out planner
2nd: Take out math facts, comp book, and a pencil
3rd: Warm Up Sheet
4th: Pick up comp book (if you didn’t get it Fri)
5th: When finished work on Graphing Picture
-6 – 3(a + 1) = –3(2 + a)
How are we going to get 4th hour caught up to the rest of the classes? - see 4th hr slide notes
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2. Dress Code Math Facts Weekly Review
The Plan for this week:
Monday: Lesson Congruent Figures
Tuesday: Lesson 2.2 – Translations
Wednesday: Lesson Reflections
Thursday: Lesson Rotations
Friday: Quiz, Lesson Similar Figures
3 minutes

3. Last Week's Challenges Answers
If a+1 = b+2 = c+3 = d+4 = a+b+c+d+5, then a+b+c+d =??
a=2/3
b=-1/3
c=-4/3
d=-7/3
a+b+c+d=-10/3
Formula’s Challenge

4. Challenge of the Week
The diagram is composed of nine overlapping circles labeled A to I. Each circle has a different number value, from 1 to 9. Where some of the circles overlap, there is a number; this number is the SUM of the values of the two overlapping circles. Can you figure out the correct number value for each circle?
Answer Key: B=1, G=2, D=3, C=4, I=5, A=6, F=7, 8=E, 9=H

5. Competition: How many can you remember in a minute?

6. Review on Graphing: Tonight’s worksheetx y

7. Congruent: figures that have same size and same shape
Essential Question: How do you determine if figures are congruent?
Vocab
Congruent: figures that have same size and same shape
Corresponding matching sides of 2 figures
sides:
Corresponding Matching angles of 2 figures
angles:

8. In triangle ABC below, line segments AB and DE are congruent.
Congruent Line Segments: have the same length. Tick marks indicate congruent line segments.
In triangle ABC below, line segments AB and DE are congruent.
Congruent Angles all have the same measure in degrees
Same # of curved marks in angles represent same degree angle. Angles A and D are congruent
Congruent Figures have ALL corresponding line segments and angles are congruent. (Same size & same shape) E D F

9. Identify any congruent figures, lines or angles.
The sides of the octagons are not congruent. Each side of the outer figure is larger than each side of the inner figure.
Angles are congruent.

10. The sectors in the figure are congruent.
Identify any congruent figures.
The sectors in the figure are congruent.

11. If all corresponding sides and angles of two polygons are congruent, then the polygons are congruent.
Triangles Side-Side-Side Rule: If the corresponding sides are congruent, then the corresponding angles will always be congruent.
This does not apply to polygons that are NOT triangles!

12. Are the triangles are congruent?
Thumbs Up or Down
Are the triangles are congruent?
6 cm
4 cm A B C
5 cm
4 cm R P Q
The triangles are not congruent. Although two sides in one triangle are congruent to two sides in the other, the third sides are not congruent.

13. For polygons with more than three sides, it is not
Thumbs Up or Down
For polygons with more than three sides, it is not
enough to compare the measures of their sides.

14. Practice

15. Example 1 Identify the line segments that are congruent in the figure.B C D E
AB AC
One tick mark
BC DE
Two tick marks
BD CE
Three tick marks

16. Practice

17. Example 2
100°
100°
80°
80°
c. What is the measure of angle K?

18. Practice
Determine the unknown measure of the side & angle in the set of congruent polygons. ?
The corresponding
sides are congruent.
135°
5 ft
120°
6 ft
45°
60°
The unknown side
length is 4 ft
The unknown angle is .
8 ft
8 ft ?
60°
45°
6 ft
5 ft
135°
120°
4 ft

19. Practice
Identify the missing measures in the set of congruent polygons.
A. a = 6, b = 9, c = 40°
B. a = 9, b = 6, c = 40°
C. a = 9, b = 6, c = 60°
D. a = 6, b = 9, c = 60°

20. Leave this side open for corrections
Name
Date
Period
Pg. 46 #1, 2, 3, 6, 7, 8, 9, 11, 12, 15
skip
Leave this side open for corrections 1.
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