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Published bySydney Price Modified over 3 years ago

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Geometry –Triangles: G 5.a; G 5.1, G 5.b; G 5.4; G 6.1,2,3,4

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To assess prior knowledge: have students make circle maps to define the following: –Scalene –Isoceles –Equilateral –Obtuse –Acute –Right Isoceles triangle

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Congruent Triangles Teacher would have Ss create Circle map to define Congruent triangles. They could then compare the different maps made (gallery walk – by posting on back wall of room) and decide what must be on every map for it to define Congruent triangles. A sample map is included. (A Circle map for Similar triangles is also included at end – but intended for a later lesson)

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Congruent Triangles Non-Example Examples DefineWays to Prove CPCTC AAS SSS SAS AAA – similar but NOT congruent No SSA A set of points having the same size and shape 1:1 correspondence of equality Identical

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Practice with Correspondence The following multi-flow maps are for practice with identifying triangle parts and correspondence After identifying relationships, (1/2: event - results) then students can pick out the items that cause congruence with rule – (1/2 : results/causes – event=congruence)

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UW = WU

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Ways to Prove Congruent Triangles SSS Item JY = CX YB = CH JB = HX SAS Item NM = OL

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Congruent Triangles Combined Figures Item. Separated Triangles.. Given

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Similar Sizes can differAA Tilde alone ~ Corresponding sides are proportional ASASAS Double Bubble – comparison – similarities & differences Congruent Correspo nding sides = Correspo nding angles = AAS SSS Equal & Tilde

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Similar Triangles Non-Example Examples DefineWays to Prove AAS SSS SAS A set of points having the same shape 1:1 correspondence of Proportionality of sides AAA

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Flow Map - Sequencing Rt. Click or Ctrl click to add text

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Event Causes Effects Multi-flow Map– Cause & effect

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Brace Map – Whole to part; physical separations

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as Bridge Map – for analogies; always put relating factor RF: as

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