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GT Geometry 3/2/11 Turn in CW/HW from yesterday by the time the bell rings. Pick up a ditto and complete 1-6
#3.16 Geo. Drill 3/2/11 Given that the following two pentagons are similar, find x. x
Geometry Drill Can you list the 5 ways to prove triangles congruent
Objective Students will use the AA, SAS and SSS similarity postulates to decide which triangles are similar and find unknowns.
Congruence vs. Similarity Congruence implies that all angles and sides have equal measure whereas...
Congruence vs. Similarity Similarity implies that only the angles are of equal measure and the sides are proportional
AA Similarity Postulate Two triangles are similar if two pairs of corresponding angles are congruent
AA Similarity Postulate A B C D E F
SAS Similarity Postulate Two triangles are similar if two pairs of corresponding sides are proportional and the included angles are congruent
SAS Similarity Postulate A B C D E F
SSS Similarity Postulate Two triangles are similar if all three pairs of corresponding sides are proportional.
SSS Similarity Postulate A B C D E F
Example 1 APE ~ DOG. If the perimeter of APE is 12 and the perimeter of DOG is 15 and OG=6, find the PE.
Conclusion Congruence vs. Similarity AA SAS SSS
Classwork/Homework Page skip 10, 11.
Warm UP Given that the following two pentagons are similar, find x. x
1 Objectives Prove that two triangles are similar using AA, SAS, and SSS.
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6.4.1 Prove triangles similar by AA. Remember that Angles define a ratio, there for the sides are dependent on the angles And, remember that given 2 angles.
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