geometry 4-12 day 1
TRANSCRIPT
Do NowDo Now
Name any common ratios/proportions Name any common ratios/proportions that you see in this figure. that you see in this figure.
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A
B
D
C
E
20
15
60
45
10
17.5
ObjectiveObjective
We will explore another proportion found We will explore another proportion found with the side splitter theorem. with the side splitter theorem.
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Note Book QuizNote Book Quiz
Do Now Questions fromDo Now Questions from 3-24-093-24-09 3-25-093-25-09
Objectives FromObjectives From 3-30-093-30-09 4-1-094-1-09
Answers for the Do NowAnswers for the Do Now 3-24-093-24-09
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HomeworkHomework
Page 312 #9 a – cPage 312 #9 a – c
c.c. 1212
d.d. 2828
e.e. 2525
Theorem 4.1 says “If the segment is Theorem 4.1 says “If the segment is parallel with the third side it splits them parallel with the third side it splits them proportionally”proportionally”
This means that This means that AD AE
DB EC=
A
B
D
C
E
How to prove it…How to prove it…
Page 313 in the BookPage 313 in the Book
Using this fact!Using this fact!
A
B
D
C
E
45
15 7
HomeworkHomework
Pg 318 #1-3Pg 318 #1-3