The document provides notes from a math lesson, including assignments due, warm-up problems to work on, and lesson content about polygons, regular polygons, congruence, similarity, and dilation. Examples are also given to identify different polygons and determine which figures are similar or congruent.

1. lesson 19.notebook September 16, 2013
Assignment:
1­­>Test #2 Review Handout ­ Due Tomorrow (9/17)
2­­>Test #2 ­ Tomorrow (9/17)

2. lesson 19.notebook September 16, 2013
Lesson 19 Warm­Up:
1) The formula for the area of a parallelogram is
A = bh. Find A when b = 7 mm and h = 9 mm.
2) Simplify: 125
3) What is the mean of the prime numbers between 10 and 20?
4) Sy swam one kilometer in 40 minutes. The length of the
pool was 25 meters. About how long did it take Sy to swim the
length?
5) Using prime factorization, reduce: 375
1000

3. lesson 19.notebook September 16, 2013
Lesson 19:
*polygon­­>closed plane figures with straight sides
*regular polygon­­>a polygon with all sides equal and all angles equal
*congruent­­>figures that are the same shape AND the same size
*similar­­>figures that are the same shape...but not necessarily the same
size
*dilation­­>an enlargement of a figure

4. lesson 19.notebook September 16, 2013
Examples ­ Lesson 19
pg. 123
A) hexagon, irregular
B) C
C) octagon
D) dodecagon

5. lesson 19.notebook September 16, 2013
E) ABEF AFEB
F) triangle B
G) A, B, and D ­ similar; B and D ­ congruent