This Instructional Activity is a part of the Lesson 10, Unit 6, Grade 7. Students understand that two triangles are identical if two pairs of corresponding angles and one pair of corresponding sides are equal under some correspondence; two angle measurements and a given side length of a triangle determine a unique triangle. Students understand that the two angles and any side condition can be separated into two conditions: (1) the two angles and included side condition and (2) the two angles and the side opposite a given angle condition. In Lesson 9, students learned two conditions that determine unique triangles: the three sides condition and the two sides and included angle condition.