Pamela Leutwyler

B

C

D

AB is parallel to CD

A

A

B

C

D

AB is parallel to CD

ABC = BCD

A

B

C

D

AB is parallel to CD

ABC = BCD

E

ABC = BCD

AEB = CED

A

B

C

D

AB is parallel to CD

ABC = BCD

E

ABC = BCD

AEB = CED

BAE = EDC

ABE is SIMILAR to CED

A

B

C

D

AB is parallel to CD

ABC = BCD

E

ABC = BCD

AEB = CED

BAE = EDC

ABE is SIMILAR to CED

X

x

A

B

C

D

AB is parallel to CD

ABC = BCD

E

ABC = BCD

AEB = CED

BAE = EDC

ABE is SIMILAR to CED

X

x

Y

y

A

B

C

D

AB is parallel to CD

ABC = BCD

E

ABC = BCD

AEB = CED

BAE = EDC

ABE is SIMILAR to CED

X

x

Y

y

Z

z

A

B

C

D

AB is parallel to CD

ABC = BCD

E

ABC = BCD

AEB = CED

BAE = EDC

X

x

Y

y

Z

z

Xx

Yy

Zz

= =

these lines are parallel

10 feet

9 feet

7 feet

3 feet

xy

10 feet

9 feet

7 feet

3 feet

xy

10 feet

9 feet

7 feet

3 feet

xy

10 feet

9 feet

7 feet

3 feet

xy

10 feet

9 feet

7 feet

3 feet

xy = 2.7

9y

10 3

=

y = 2.7 feet

10 feet

9 feet

7 feet

3 feet

x= 2.1

y = 2.7

7x

10 3

=

x = 2.1

10 feet

9 feet

7 feet

3 feet

x= 2.1

y = 2.7

these lines are parallel

these lines are parallel

these angles have equal measure

these lines are parallel

these angles have equal measure

these angles have equal measure

these lines are parallel

these angles have equal measure

these angles have equal measure

these triangles are similar

these lines are parallel

these angles have equal measure

these angles have equal measure

these triangles are similar

P

p

Q

q

R

r

Rr

Qq

Pp

= =

A

B

C

DE

BE is parallel to CD

CD = 12 feet

BE = 9 feet

AD = 20 feet

AE = ?

A

B

C

DE

BE is parallel to CD

CD = 12 feet

BE = 9 feet

AD = 20 feet

AE = 15 feet

12 9

20 x

=

x = 15