# 4-1 Congruent Figures. Congruent figures have same size and shape When 2 figures are congruent you can slide, flip, or turn one so that it fits exactly.

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4-1 Congruent Figures

Congruent figures have same size and shape When 2 figures are congruent you can slide, flip, or turn one so that it fits exactly on the other one

Congruent Figures Congruent Polygons: Have congruent corresponding parts – matching sides and angles. When naming congruent polygons you must list corresponding vertices in the same order

Problem 1: Finding Congruent Parts

Problem 2: Using Congruent Parts The wings of an SR-71 Blackbird aircraft suggest congruent triangles. What is m<D?

Problem 3: Finding Congruent Triangles Are the triangles congruent? Justify your answer.

Third Angles Theorem If two angles of one triangle are congruent to two angles of another triangle, then the third angles are congruent

Problem 4: Proving Triangles Congruent

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