3.4.  The sum of the measures of the angles of a triangle is 180.

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Presentation transcript:

3.4

 The sum of the measures of the angles of a triangle is 180.

 The measures of the exterior angle of a triangle is equal to the sum of the measures of the two remote interior angles.

 If two angles of one triangle are congruent to two angles of a second triangle then the third angles are congruent.

 Each angle of an equilateral triangle measures 60.

 In a triangle, there can be at most one right angle or at most one obtuse angle.

 The acute angles of a right triangle are complementary.