Geometry, Teacher\'s Edition

• Congruent


• Complementary angles


• Supplementary angles


• Linear pairs


• Line pair postulate


• Vertical angles


• Vertical angles theorem

IV.AlternativeAssessment

• This is a great lesson to use an observation checklist. Make the checklist prior to teaching the lesson. Then
  use it while groups complete and present their charts. It will provide you with clear things to look and listen
  for when teaching this lesson.

Classifying Triangles

I.SectionObjectives

• Define triangles


• Classify triangles as acute, right, obtuse, equiangular


• Classify triangles as scalene, isosceles, or equilateral

II.MultipleIntelligences

• This activity is a drawing activity that involves students creating a design and then classifying the triangles
  within the design.
  
  
  • The students are given plain paper and a ruler. They are told to create a page of triangles created by
    intersecting lines.
  
  
  • Once they have finished, ask them to create a key and to color (use crayons or colored pencils) to color
    in the different triangles found in the design.
  
  
  • Students can be asked to finish this design for homework.
  
  
  
  


• Multiple Intelligences- logical- mathematical and spatial- visual

III.SpecialNeeds/Modifications

• Provide students with a diagram of a triangle with the vertices labeled, the sides labeled and the angles labeled.
  Be sure that students understand where to find the interior angle. They will need this to classify the triangles.


• Write all vocabulary words on the board/overhead. Request that students copy these notes into their notebooks.


• Vocabulary for classifying by angles
  
  
  • Right
  
  
  • Obtuse
  
  
  • Acute
  
  
  • Equiangular
  
  
  
  


• Vocabulary for classifying by side lengths
  
  
  • Scalene
  
  
  • Isosceles
  
  
  • Equilateral
  
  
  
  

Chapter 4. Geometry TE - Differentiated Instruction