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Geometric Figures and Lines: Main Idea, Vocabulary, and Examples

This lesson reinforces the identification and labeling of basic geometric terms, including point, line, ray, line segment, plane, intersecting lines, perpendicular lines, and parallel lines. It also covers the identification of congruent line segments and the drawing of lines of symmetry in geometric shapes.

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Geometric Figures and Lines: Main Idea, Vocabulary, and Examples

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  1. Splash Screen

  2. Five-Minute Check (over Lesson 12–7) Main Idea and Vocabulary NYS Core Curriculum Key Concept: Geometric Figures Example 1: Identify a Figure Key Concept: Pairs of Lines Example 2: Describe a Pair of Lines Key Concept: Congruent Segments Example 3: Identify Congruent Line Segments Lesson Menu

  3. I will identify and label basic geometric terms. • point • line • ray • line segment • plane • intersecting lines • perpendicular lines • parallel lines • congruent line segments Main Idea/Vocabulary

  4. Reinforcement of 4.G.2 Identify points and line segments when drawing a plane figure 5.G.11 Identify and draw lines of symmetry of basic geometric shapes Also addresses 5.CM.9, 5.CM.10, 5.CM.11. NY

  5. KC

  6. Answer:So, it is a line segment. The figure can be named PQ or QP. Identify a Figure Identify the figure. Then name it using symbols. The figure is between two endpoints. The end points indicate that the line stops at those two points. Example 1

  7. A B C D • A. • B. • C. • D. Identify the figure. Example 1

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  9. Describe a Pair of Lines Describe the lines as intersecting, perpendicular, or parallel. The lines cross at one point, so they are intersecting. Since they also form a square corner, they are perpendicular lines. Answer: intersecting and perpendicular Example 2

  10. A B C Describe the lines as intersecting, perpendicular, or parallel. • intersecting • perpendicular • parallel Example 2

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  12. Identify Congruent Line Segments Determine whether the line segments are congruent. Write yes or no. Answer: Yes, the line segments have the same length, so they are congruent. Example 3

  13. A B Determine whether the line segments are congruent. Write yes or no. • yes • no Example 3

  14. End of the Lesson End Lesson

  15. Five-Minute Check (over Lesson 12–7) Image Bank Math Tool Chest Identify Angles Resources

  16. A B C D (over Lesson 12–7) Use any strategy to solve. Salvador and his family will visit a theme park. Adult tickets cost $21. The total cost of tickets for the two adults and four children in Salvador’s family is $106. How much are children’s tickets? • $16 • $32 • $15 • $22 Five Minute Check 1

  17. End of Custom Shows

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