Theorems about Triangles

21st Century Lessons: A Boston Teachers Union Initiative
21st Century Lessons: A Boston Teachers Union Initiative
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  • Preview of MA_G-CO-10_Theorems_about_Triangles_Day_1.docx - page 1
  • Preview of MA_G-CO-10_Theorems_about_Triangles_Day_2.docx - page 1
Subject Math
Grade Level Grades 9-12
Resource Type Handout, Lesson Plan
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Students will conjecture and prove that 1) the interior angles of a triangle add to 180 degrees and 2) that the line segment connecting the midpoints of two sides of a triangle is parallel to and half the length of the third side of the triangle.

Reading Comprehension Worksheets
High School Lesson Plan Template
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MA_G-CO-10_Theorems_about_Triangles_Day_1.docx

Handout
February 13, 2020
1.0 MB
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MA_G-CO-10_Theorems_about_Triangles_Day_1.pptx

Lesson Plan
February 10, 2020
2.8 MB
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MA_G-CO-10_Theorems_about_Triangles_Day_2.docx

Handout
February 13, 2020
0.2 MB
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MA_G-CO-10_Theorems_about_Triangles_Day_2.pptx

Lesson Plan
February 10, 2020
2.5 MB
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