AeL - Advanced eLearning :: The Sum of the External Angle of a Triangle

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The Sum of the External Angle of a Triangle
	In this interactive moment, students can observe in an animated demonstration that the sum of the angles of any triangle is equal to 180°. Level 2 Keywords triangle, angle, 180 degrees, exterior, interior, straight line, sum of angles, problem solving

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	The Sum of the Measures of the Angles of a Triangle – Demonstration 1 In this lesson moment, students can observe in an animated demonstration that the sum of the angles in any triangle is equal to 180°.
	The Sum of the Measures of the Angles of a Triangle: Applications (1) Students can learn how to calculate different angles in a triangle just by solving the applications.