The corresponding parts of congruent triangles are the parts that match if you place the triangles on top of each other.
Copy the diagram below.
You can prove triangles congruent if you know that certain relationships exist between corresponding parts. If you know that triangles are congruent, you know that all their corresponding parts are congruent.
You and some neighbors are landscaping a community park. The organizer of the project selects an area for two congruent triangular rock gardens. You agree to be in charge of placing the pieces of wood to outline the gardens. The only tools you have are a saw, a protractor, and two very long pieces of wood. Describe one way to guarantee that the triangular outlines will be congruent. Justify your answer.