A
F
E
C
B
D
What additional information do you
need to prove ∆ABC = ∆DEF by SAS?
BC = EF
J
R
M
A
Is JM an altitude, a median,
both or neither?
both (triangles are congruent by SSS)
J
R
M
A
Is JM an altitude, a median,
both or neither?
altitude
A
F
E
C
B
D
What additional information do you
need to prove ∆ABC = ∆DEF by AAS?
<C = <F
J
O
N
L
K
M
What additional information do you
need to prove ∆JKL = ∆MNO by AAS?
JL = MO
OR
KL = NO
J
R
M
A
Is JM an altitude, a median,
both or neither?
both (triangles are congruent by AAS)
J
O
N
L
K
M
What additional information do you
need to prove ∆JKL = ∆MNO by AAA?
Trick Question—∆s cannot be
proven congruent by AAA!
J
P
N
M
A
H
∆JAM = ∆_____
HNP by _______?
ASA
J
B
M
A
∆JAM = ∆_____
JBM by _______?
SAS
(reflexive prop)
J
R
M
A
Is JM an altitude, a median,
both or neither?
median
J
R
M
A
∆JAM = ∆_____ by _______?
NOT congruent!
D
A
J
Y
M
∆JAM = ∆_____
DAY by _______?
ASA
(all radii of a circle are congruent)
J
Z
M
A
∆JAM = ∆_____
JZM by _______?
AAS
(reflexive prop)
A
F
E
C
B
D
What additional information do you
need to prove ∆ABC = ∆DEF by ASA?
<A = <D
J
R
M
A
Is JM an altitude, a median,
both or neither?
both
J
R
M
A
Is JM an altitude, a median,
both or neither?
median
J
O
N
L
K
M
What additional information do you
need to prove ∆JKL = ∆MNO by ASA?
JK = MN
J
K
M
A
D
∆JAM = ∆_____
DKM by _______?
AAS
(vertical angles)
J
R
M
A
Is JM an altitude, a median,
both or neither?
both (triangles are congruent by SAS)
The best thing you can do to prepare
for the proof is to re-look at the
proofs from this unit—especially the
ones from the past 2 nights
regarding altitude and median.
If you would like to come in Friday
morning, I will be at school around
6:30. See you then!