# 3.13 - Congruence

The student will

• identify and describe congruent and noncongruent figures.

### BIG IDEAS

• So that I can understand that some shapes are the same even when their position or location changes
• So that I can create a matching copy of a shape or image

### UNDERSTANDING THE STANDARD

• Congruent figures have the same size and shape. Noncongruent figures do not have exactly the same size and shape.  Opportunities for exploring figures that are congruent and/or noncongruent can best be accomplished by using physical models.
• Congruent plane figures remain congruent even if they are in different spatial orientations.
• Figures that are congruent or noncongruent may be identified by using direct comparisons and/or tracing procedures.

### ESSENTIALS

The student will use problem solving, mathematical communication, mathematical reasoning, connections, and representations to

• Identify examples of congruent and noncongruent figures.
• Determine and explain why plane figures are congruent or noncongruent.

### KEY VOCABULARY

Updated: Mar 15, 2019