Unit 6, Lesson 14# Checking for Identical Triangles (Continued)

EngageNY 45 min(s)

Students use information, such as vertical angles and common sides in the structure of triangle diagrams, to establish whether conditions that determine a unique triangle exist. Students use conditions that determine a unique triangle to determine when two triangles are identical. Students construct viable arguments to explain why the given information can or cannot give a triangle correspondence between identical triangles. For example, they may share a common side, may be arranged in a way so that two angles from the triangles are vertical angles, and so on.