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Classifying Triangles

Classifying Triangles. Geometry (Holt 4-2) K. Santos. Triangle. Triangle—is a figure with 3 sides A B C Sides , , Vertices (vertex) points: A, B and C. Triangle Classification—By Angle Measurements. Acute triangle—3 acute angles

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Classifying Triangles

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  1. Classifying Triangles Geometry (Holt 4-2) K. Santos

  2. Triangle Triangle—is a figure with 3 sides A B C Sides , , Vertices (vertex) points: A, B and C

  3. Triangle Classification—By Angle Measurements Acute triangle—3 acute angles Equiangular triangle—3 congruent acute angles Right Triangle—one right angle Obtuse Triangle—one obtuse angle

  4. Classify the triangles--Angles Classify each triangle by its angle measures A B D C BDC obtuse triangle BDA Acute triangle

  5. Triangle Classification—By Side Lengths Equilateral Triangle: 3 congruent sides Isosceles Triangle: at least 2 congruent sides Scalene Triangle: no congruent sides

  6. Classify the triangle--sides Classify each triangle by its side lengths. H 12 11 E 10 F GTriangle EHF isosceles triangle Triangle EHG scalene triangle

  7. Finding side lengths F Find the side lengths of the triangle. 3y – 4 5y - 10 G 2y + 3 H GF = GH 3y – 4 = 2y + 3 y – 4 = 3 y = 7 GF = 3y – 4 GH = 2y + 3FH = 5y – 10 GF = 3(7) – 4GH = 2(7) + 3FH = 5(7) -10 GF = 17GH = 17FH = 25

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