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Yeah, parent-teacher conferences!
Find the measures of the numbered angles
m∠1 = 60 ° m∠2 = 50 ° m∠3 = 80 ° m∠4 = 100 °
Lesson 4-3
• I can name and label corresponding parts of congruent triangles.
vertices
S
A
M
ΔSAMΔMSAΔASMetc…..
sizeshape
Angle measure
betweenness
colinearity
distance A
B
CD
W
X
YZ
∆ABC ≅ ∠A ≅ ∠J ∠B ≅ ∠K ∠C ≅ ∠L∆JKL AB ≅ JK BC ≅ KL CA ≅ LJ
R
G
D
X
L
N
∠G ≅ ∠L ∠R ≅ ∠X ∠D ≅ ∠N GR ≅ LX RD ≅ XN GD ≅ LN
∆ABC ≅∆ADC ∠B ≅ ∠D ∠ACB ≅ ∠ACD ∠BAC ≅ ∠DAC
AB ≅ AD BC ≅ DC AC ≅ AC
B
A C
D
A C
∆DCB∠D ∠DCB ∠DBC DC CB DB
ASSIGNMENT:4-2 worksheet
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