Reflection: Perseverance Angles of a Triangle - Section 1: Discussion of the Homework


It was interesting to see the student reactions to the last two problems in this problem set. Some students were indignant that I had expected them to solve problems that had not yet been taught to them.  A greater number of students, however, had wrestled with these problems, tried different approaches, and were so psyched when they were able to figure the problems out on their own (MP1).  

This gave me a lot of information about my students - not just about their understanding of the material, but about them as problem solvers and mathematicians.  

As we progressed through this unit, I also noticed that those students who had worked to devise their own method for solving these problems were completely comfortable when faced with similar problems. Because they really understood the solutions they had created, they "owned" that material!

  Perseverance: Problems They've Never Seen Before
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Angles of a Triangle

Unit 3: Parallel Lines
Lesson 3 of 5

Objective: SWBAT prove that the sum of the measures of the angles of a triangle is 180 degrees, and SWBAT solve problems involving the interior and exterior angles of triangles.

Big Idea: Students learn about the different types of triangles, the relationships between the interior and exterior angles of a triangle, and apply their knowledge to numerical problems and constructions.

  Print Lesson
Math, Geometry, parallel lines, Similarity and Congruence, right triangle, triangle, equilateral, equiangular, Scalene, isosceles, acute triangle, obtuse triangle, remote interior angle, geogebra
  90 minutes
image triangles
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