Day 3 Problems 101906

1
Day 3 Problems10/19/06

• Write the theorem that justifies the statement
  about the diagram.
• 5 and 6 are right angles. 2. j k
• What can you conclude about 1 and 2 using
  the given information?
• 3. FE EH 4. n m
• 5. h k

j
m
7
8
n
5
6
k
n
G
F
1
2
1
2
E
m
H
h
1
2
k
2
3.2 Theorems about Perpendicular Lines (Cont.)

• Use Algebra with Perpendicular Lines.
• In the diagram, EF EH and m GEH 30. Find
  the value of y.
• So, 6y 30 90 m FEG m GEH
  90
• 6y 60 Subtract 30 from each side
• y 10 Divide each side by 6.
• The value of y is 10.

G
F
6y
30
E
H
3
Use Algebra with Perpendicular Lines

• Find the value of the variable.
• EFG HFG 2. AB AD 3. KJ KL,
• JKM MKL
• 5x 90 36 9y 90 z
  z 90
• x 18 9y 54 2z 90
• y 6 z 45

G
B
C
5x
36
J
M
F
9y
E
H
A
z
D
z
K
L
4
More Practice!!

• Textbook p. 118 17 25.
• Homework Worksheet 3.2