Reflection: Complex Tasks Review of Solving Triangles Day 1 of 2 - Section 2: Review


As student work on the review activity. I see a lot of common struggles. I have many students that decide to make up their own problem which is great. As students begin with problem 1 they are unsure how to determine the sides and/or angles. Some students decide to randomly pick 3 sides. I question students "How can you verify these 3 lengths make a right triangle?" After some thought a student states if I know 2 sides of a right triangle I can find the third side using the Pythagorean Theorem.

Another misconception in problem 1 is that all right triangles are 45-45-90. I ask" So a 20-70-90 is not a right triangle?" This is something they should know but many students generalize ideas too much. By doing this review activity students realize and correct some ideas.

Other students just need a reminder of topics by doing a few suggested problems and then finding a problem or making a problem up will help students focus on the problems.  Looking at what students determine as important will also help students in their understanding.

  Complex Tasks: Common struggles
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Review of Solving Triangles Day 1 of 2

Unit 6: Solving Problems Involving Triangles
Lesson 11 of 13

Objective: SWBAT solve problems involving the measurements of triangles.

Big Idea: By creating problems for others to solve, students will review solving triangles using multiple methods.

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Math, Law of Cosines, law of sines, triangles (Determining Measurements), right triangle, vector, area of triangle, problem solving, pre
  45 minutes
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