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Grade 4

CCSS Math Standard: 4.G.1

Draw points, lines, line segments, rays, angles (right, acute, obtuse), and perpendicular and parallel lines. Identify these in two-dimensional figures.

Grouping Shapes by Parallel and Perpendicular Sides

Which shapes go together based on parallel and perpendicular lines?

 Geometry Image: Esplanade Theaters

What odd and interesting shapes can your students find in this geometric image?

 Geometry Image: University Ave

What odd and interesting shapes can your students find in this geometric image?

 Geometry Image: Victoria Conference Center

What odd and interesting shapes can your students find in this geometric image?

 Geometry Image: Skytree

What odd and interesting shapes can your students find in this geometric image?

 Geometry Image: Steigerwald

What odd and interesting shapes can your students find in this geometric image?

 Perpendicular Lines or Not? – Concept Attainment

In this concept attainment lesson, students try to determine if lines are perpendicular or not

 The Angles of a Triangle

Why tell a kid the rules of a triangle when they can discover them!?

 Lines, Line Segments, Rays, and Infinity!

A lesson about lines, line segments, and rays that avoids dull memorization. Instead, we ponder this delightful question: Which is longer, a ray or a line? Then, kids consider what these different geometric concepts would think about each other.