Investigating Similar Triangles and Understanding Proportionality ...

Warm-UpCST/CAHSEEIn the diagram below, .Which of the following conclusions doesnot have to be true?A. and are supplementary angles.B. Line l is parallel to line m.C.D.What do we call the pairs of angles in answer choices C and D?Corresponding Angles and Alternate Interior AnglesUse the proof to answer the questions below.Given: ; D is the midpoint of .Prove:ReviewStatementReason1. ; D is the midpoint of . 1. Given A. AAS2. 2. Definition of Midpoint B. ASA3. 3. Reflexive Property C. SAS4. 4. ? D. SSSToday’s Standards:CA State Standard Geometry 4.0: Students prove basic theorems involving congruence and similarity.CA State Standard Geometry 5.0: Students prove that triangles are congruent or similar, and they are able to use theconcept of corresponding parts of congruent triangles.