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• An inscribed angle of a triangle intercepts a diameter If BCD is a semicircle, then m∠BCD = 90. ?

Triangle Angle Sum Theorem The sum of the measures of the angles of a triangle is 180. 4-2 ©Glencoe/McGraw-Hill 189 Glencoe Geometry Lesson 4-2 Angle Sum Theorem If the measures of two angles of a triangle are known, the measure of the third angle can always be found. Triangle Angle Sum Theorem The sum of the measures of the angles of a triangle is 180. 206 Chapter 4 Congruent Triangles Key Concepts Postulate 4-2 Side-Angle-Side (SAS) Postulate If two sides and the included angle of one triangle are congruent to two sides and the included angle of another triangle, then the two triangles are congruent. hr direct vons schedule Study Guide and Intervention Workbook 000i_GEOSGIFM_890848. 4-2, Study Guide and Intervention. Angles of Triangles. m/1 5 m/A 1 m/B C A B D 1 Find m/1. • An inscribed angle of a triangle intercepts a diameter If BCD is a semicircle, then m∠BCD = 90. mosaic hall ucsd One way is to use T(a, 0), R(a, 0), and S(0, c). A right triangle is a triangle in which one angle is a right angle. Classify Triangles by One way to classify a triangle is by the measures of its angles. • corresponding angles • alternate interior angles. regal ukiah Master the skills necessary to solve problems involving congruent triangles, such as proving congruence, finding missing angles and sides, and solving real-world applications. ….

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