Step 5 taking the 3 smaller triangles and putting

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Step 5: Taking the 3 smaller triangles and putting them together so that their vertices are concurrent. (Students will need to use a ruler to make sure they are making straight angles.) Step 6: Have each student measure the three angles the total of the 3 angles should measure out to be 180o’s total for angles A, B, and C added all together. Step 7: Ask all students what they came up with for totals and if they got something other than 180o’s ask them to repeat the process showing you step by step to assure they really understand the principle of the lesson. Explaining to them that even though the angles of the triangle are different sizes the total will always be 180o’s. Conclusion: After all students have completed this exercise properly explain the geometric principle to them. Explaining how this principle is confirmed that the sum of angles in a triangle will always be considered a straight angle measured out at 180o’s. Making sure to follow all standards of the NCTM will be crucial to this lesson as you will need to affirm the proper use of principle. Using this type of geometrical manipulative will really help the students to understand and remember the lesson as they will have many more hands on steps to accomplish and those activities are usually the ones that are remembered the most.
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