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7th Grade Math / Lesson 9: Congruent

What will we be learning in this lesson?

  • In this lesson, you will learn about congruent shapes.
Vocabulary words are found in this purple color throughout the lesson. Remember to put these in your notebook.

Congruent Figures

  • Congruent figures are those that have the same exact size and same exact shape. The two figures are exactly the same.

  • These two shapes are congruent. The only difference between them is that one shape has been turned (rotated).

  • All angles and all sides measure to be exactly the same.

Congruent Figures

  • When you have congruent figures, the corresponding sides are marked with slash marks.

  • Corresponding sides are the sides that match from one shape to the other.

  • The sides that match are indicated by the same number of slash marks.

  • The sides with one slash mark match each other. The sides with two slash marks match each other. The sides with three slash marks match each other

Congruent Figures

  • Congruent shapes also have corresponding angles.

  • Corresponding angles are the angles that match from one shape to the other.

  • Corresponding angles can also be represented by the slash marks through the angles.

  • With these congruent figures, the corresponding angles are
        A and J
        B and K
        C and L

  • Can you identify congruent figures?

  • Can you label corresponding sides and angles of congruent figures?

  • Go back to the classroom to get to your homework and any other items you need to attend to.