Points, lines, and planes

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Geometry Point Line Line segment Ray Plane Parallel lines

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Presentation transcript:

Points, lines, and planes Lesson 16-1 CCSS 4.G.1 Literature Link: The Shape of Things by Dayle Ann Dodds

MATH Essential Questions How can lines, angles, and shapes be described, analyzed, and classified? MATH Essential Questions

MATH Essential Questions How are angles measured, added, and subtracted? MATH Essential Questions

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Today’s Lesson In this lesson, you will identify, name, and draw points, lines, and planes. Let’s look at the Envision Video for this lesson and take the quiz.

Points - Vocabulary A point is an exact location in space. A point is usually named with one capital letter, for example Point A. There are many points along a line. B C

lines A line goes on forever and ever in both directions. There is an arrow on either end of the line. Lines are always straight. Classify these figures as either lines or not lines.

Parallel lines Parallel lines are lines that will never meet or cross one another. Look around you! Where do you see examples of parallel lines?

Intersecting lines Intersecting lines cross one another at some point. Perpendicular lines are a type of intersecting lines. When they meet, their corners form perfect right angles, or square corners. Which of the examples above are perpendicular lines?

Practice! Look at the map. Name streets that form parallel lines and intersecting lines.

More practice! Look at the pictures. Identify the lines in the picture as parallel or intersecting.

plane A plane is an endless flat surface.

Points - Planes - Lines - Check out these videos Points - Planes - Lines -

Partner activity

Lesson Wrap Up Reflection: Explain what you did in math class today. In this lesson, you learned how to name and describe points, lines, and planes. Reflection: Explain what you did in math class today. Homework (16-1 Practice) for one “Paw Signature” and (16-1 Reteaching & Practice) if you want two “Paw Signatures.” Website for Practice: https://www.ixl.com/math/geometry/identify-parallel- perpendicular-and-skew-lines-and-planes