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Section 4.2 – Angle Relationships in Triangles Triangle Sum Theorem: The sum of the angle measures of a triangle is 180!. B A C 1 2 3 Example 1: The map of France commonly used in the 1600s was significantly revised as a result of a triangulation survey. The diagram shows part of the survey map. Use the diagram to find the indicated angle ...

5.1 Angles of Triangles with answers 4 Triangle Sum Theorem: The sum of the measure of the interior angles of a triangle is 180o. Exterior Angle Theorem: The measure of an exterior angle of a triangle is equal to the sum of the measures of the two nonadjacent interior angles.

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the sum of the angles of a triangle equals two right angles 1800 2 the sum of the exterior angles of a triangle equals four right angles 3600 gina wilson triangle sum theorem media publishing ebook epub

Triangle Angle Sum Theorem Worksheet Answer Key. The angles in a triangle add to 180º. 21) x + 50x + 60 A 22) 106° 38x + 3 14x - 1 A 23) 6x - 1095° 4x + 5 A 24) 60° 3x + 7 x. List the from longest to mzc so AB. This free geometry worksheet begins with problems on classifying triangles by the number of congruent sides it has (scalene, isosceles, or equilateral) and by their angles (acute, obtuse, right, or straight).

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Alternate Interior Angles Theorem 4. m∠l = m∠4, m∠3 = m∠5 4. Defi nition of congruent angles c. 5. m∠l + m∠2 + m∠3 = 180° 5. Substitution Property of Equality Plan for Proof Plan in Action Theorem Exterior Angle Theorem The measure of an exterior angle of a triangle is equal to the sum of the measures of the two nonadjacent ...

Find the measure of angle A. 21) 84 ° x + 59 x + 51 A 44 ° 22) x + 37 x + 67 A 30 ° 23) 130 ° 8x + 4 3x − 6 A 30 ° 24) 80 ° 4x + 17 x + 23 A 35 °-3-Create your own worksheets like this one with Infinite Geometry. Free trial available at KutaSoftware.com