4.2 Congruent Figures

HW pg. 228 #3­15 odd, 19­21, 26

October 15, 2014

4.2 Congruence & TrianglesCongruent Figures: all of the parts in 1 figure are ≅ to the corresponding parts of the other.

4.2 Congruent Figures

HW pg. 228 #3­15 odd, 19­21, 26

October 15, 2014

4.2 Congruent Figures

HW pg. 228 #3­15 odd, 19­21, 26

October 15, 2014

Third Angle TheoremIf 2 angles in one ∆ are = in measure to 2 angles of another ∆, then the 3 rd angle in each triangle are ≅ .

D

E

FA

B

C

<A ≅ <D & <B ≅ <E; therefore <C ≅ <F

4.2 Congruent Figures

HW pg. 228 #3­15 odd, 19­21, 26

October 15, 2014

4.2 Congruent Figures

HW pg. 228 #3­15 odd, 19­21, 26

October 15, 2014

Theorem 4.4 Properties of Congruent TrianglesReflexive: ABC ≅ ABC

Symmetric: If ABC ≅ DEF, then DEF ≅ ABC

Transitive: If ABC ≅ DEF & DEF ≅ JKL, then ABC ≅ JKL

4.2 Congruent Figures

HW pg. 228 #3­15 odd, 19­21, 26

October 15, 2014

HW pg. 228 #3-15 odd, 19-21 & 26

4.2 Congruent Figures

HW pg. 228 #3­15 odd, 19­21, 26

October 15, 2014

#19.