4.1 Classifying Triangles textbook page 173 Classification by Sides  Equilateral – 3 congruent sides  Isosceles – 2 congruent sides  Scalene – no.

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Presentation transcript:

4.1 Classifying Triangles textbook page 173

Classification by Sides  Equilateral – 3 congruent sides  Isosceles – 2 congruent sides  Scalene – no congruent sides

“Checkpoint” pg 173 prob 1-3  1) isosceles  2) equilateral  3) scalene

Classification by Angles  Equiangular – 3 congruent angles  Acute – 3 acute angles  Right – 1 right angle  Obtuse – 1 obtuse angle

“Checkpoint” pg 174 prob 4-6  4) acute isosceles  5) acute scalene  6) obtuse isosceles

 The vertex of a triangle is a point that joins two sides of the triangle. The side not connected to the vertex is the opposite side. A C B point B is a vertex AC is opposite < B

Homework  Assignment # 1  textbook page 175  problems 1-22 all, all, 57, odd