Warm Up 08.18.11Week 1

1) │4 – 11│

2) │1.2 – 4.3│

( -2 )2 + 323)

Homework 1.3 Day 1

34) AB = √125, BC = √25, AC = √130

36) GH = √50, HJ = √37, GJ = √61

35) DE = √85, EF = √72, DF = √25

37) AC = √45, BC = √45, CD = √40

38) GE = √25, GF = √25, GH = √26

39) LN = √117, MN = √109, PN = √90

40) PQ ≅ QR

41) PQ ≅ QR

42) PQ ≅ QR

43) PQ ≅ QR

Geometry1.3 Day 2

I will use the Distance Formula to measure distance

Re 1

••A B

•C

AB 7

21

AB + 7 = 21

AB = 21 - 7

AB = 14

Distance Formula ( x2 – x1 )2 + ( y2 – y1 )2AB =

B

AC

D

(-4 , 3 )

(-1 , 1 )( 2 , -1 )

( 3 , 2 )

Ex 2

( x2 – x1 )2 + ( y2 – y1 )2AD =

( 2 – ( -1 ) )2 + ( ( -1 ) – 1 )2AD =

( 3 )2 + ( -2 )2AD =

9 + 4AD =

13AD =

A( -1 , 1 ) D( 2, -1 )

( x1, y1 ) ( x2, y2 )

Do 2 ( x2 – x1 )2 + ( y2 – y1 )2AC =

Ex 3 Is JK KL ?

J ( 0 , 0 )

K ( 5 , 2 )

L ( 8 , 6 )

( 5 – 0 )2 + ( 2 – 0 )2JK =

( 5 )2 + ( 2 )2JK =

25 + 4JK =

29JK =

Is JK KL ?

J ( 0 , 0 )

K ( 5 , 2 )

L ( 8 , 6 )

( 8 – 5 )2 + ( 6 – 2 )2KL =

( 3 )2 + ( 4 )2KL =

9 + 16KL =

25KL =

JK and KL are not

Review

Assignment

Textbook page 22, 34 – 43 all and 46.

What is a Postulate?

Is JK J ( 0 , 0 )

K ( 5 , 2 )

L ( 8 , 6 )

JLDo 3: