3.4 Parallel Lines and the Triangle Angle Sum...

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3.4 Parallel Lines and the Triangle Angle Sum Theorem 1 October 07, 2009 Mar 1812:23 PM 3.4 Parallel Lines and the Triangle AngleSum Theorem Objectives: *Classify triangles and find the measures of their angles. *Use exterior angles of triangles.

Transcript of 3.4 Parallel Lines and the Triangle Angle Sum...

Page 1: 3.4 Parallel Lines and the Triangle Angle Sum Theoremstaffweb.psdschools.org/kemotich/Mrs_Motichka... · 3.4 Parallel Lines and the Triangle Angle Sum Theorem 2 October 07, 2009 Mar

3.4 Parallel Lines and the Triangle Angle Sum Theorem 

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3.4 Parallel Lines and the Triangle Angle­Sum Theorem

Objectives:*Classify triangles and find the measures of their angles.*Use exterior angles of triangles.

Page 2: 3.4 Parallel Lines and the Triangle Angle Sum Theoremstaffweb.psdschools.org/kemotich/Mrs_Motichka... · 3.4 Parallel Lines and the Triangle Angle Sum Theorem 2 October 07, 2009 Mar

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Check Skills You'll NeedClassify each angle as acute, right, or obtuse.1. 2. 3.

Solve each equation.4.  30 + 90 + x = 180 5.  55 + x + 105 = 180

6.  x + 58 = 90 7.  32 + x = 90

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Classify each triangle by its angles.

Classify each triangle by its sides.

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Page 10: 3.4 Parallel Lines and the Triangle Angle Sum Theoremstaffweb.psdschools.org/kemotich/Mrs_Motichka... · 3.4 Parallel Lines and the Triangle Angle Sum Theorem 2 October 07, 2009 Mar

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Homework:  page 150 

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