4.1 Classifying Triangles. Students will be able to… - Classify triangles by their angle measures and side lengths. - Use triangle classification to find.

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Presentation transcript:

4.1 Classifying Triangles

Students will be able to… - Classify triangles by their angle measures and side lengths. - Use triangle classification to find angle measures and side lengths.

 Go over tests and grades

TermNameDiagramAdditional Notes Acute Triangle- Has three acute angles - Use to classify triangles by its angles

TermNameDiagramAdditional Notes Acute Triangle- Has three acute angles - Use to classify triangles by its angles Equiangular Triangle -Has three congruent angles -All angles 60º -Use to classify triangles by its angles

TermNameDiagramAdditional Notes Acute Triangle- Has three acute angles - Use to classify triangles by its angles Equiangular Triangle -Has three congruent angles -All angles 60º -Use to classify triangles by its angles Right Triangle-Has one right angle -Use to classify triangles by its angles

TermNameDiagramAdditional Notes Acute Triangle- Has three acute angles - Use to classify triangles by its angles Equiangular Triangle -Has three congruent angles -All angles 60º -Use to classify triangles by its angles Right Triangle-Has one right angle -Use to classify triangles by its angles Obtuse Triangle-Has one obtuse angle -Use to classify triangles by its angles

Term NameDiagramAdditional Notes Equilateral Triangle -Has three congruent sides -Use to classify triangles by side lengths

Term NameDiagramAdditional Notes Equilateral Triangle - Has three congruent sides -Use to classify triangles by side lengths Isosceles Triangle - Has two congruent sides -Use to classify triangles by side lengths

Term NameDiagramAdditional Notes Equilateral Triangle - Has three congruent sides -Use to classify triangles by side lengths Isosceles Triangle - Has two congruent sides -Use to classify triangles by side lengths Scalene Triangle- Has no congruent sides -Use to classify triangles by side lengths

 It is important to remember…  Triangles can be classified 2 ways; by their Angle Measures or by their side lengths.

 Remember if you ever have trouble reading a picture ask about it! Especially on the test.  If you are unsure what angle something is pointing to, ask about it.

 What are the three triangles in the picture?  Classify each triangle by angle measures

 When you look at a figure, you cannot assume segments are congruent based on appearance.  They must be marked as congruent either with numbers or tic marks.

EG = EF + FG EG = EG = 14

JL = 5 (8.5) + 2 = 44.5 JK = 4 (8.5) – 10.7 = 23.3 KL = 2 (8.5) = 23.3 Therefore… Isosceles Triangle

Therefore… Equilateral Triangle