Wyoming Math 1.G.1
The Standard
Distinguish between defining attributes (e.g., triangles are closed and three-sided) versus non-defining attributes (e.g., color, orientation, overall size); for a wide variety of shapes; build and draw shapes to possess defining attributes.
2023 Wyoming Mathematics Content and Performance Standards · Reason with shapes and their attributes.
Teacher's field guide
What This Standard Means
What Students Need to Do
- Students tell which features make a shape what it is, such as straight sides and a closed outline. They build and draw shapes with those features, even when the shapes differ in color, size, or direction.
What Mastery Looks Like
- A student recognizes a tilted triangle as a triangle and rejects three lines that do not meet. They can draw a closed triangle and explain why its color and size do not change its name.
Common Misconceptions
- Students may call a tilted square a diamond instead of a square. They may think any three lines make a triangle, even when the ends do not meet. Some sort shapes by color or size rather than by their outlines.
How to Assess It
- Show a small blue triangle, a large tilted red triangle, and three lines that do not form a closed shape. Ask, “Which are triangles? Why? Draw one more.”
Lesson moves
Ways to Teach It
Give pairs straws and clay to build a closed triangle and an open outline made from three straws, then compare them.
Show a tilted square beside an upright square and ask, “Are both squares? What would you check?”
Deal shape cards in different colors, sizes, and directions; have partners sort them by shape and explain two choices.
Show a yield sign and a round clock face; have students trace each outline and name the features that matter.
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Printable 1.G.1 Worksheet
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Related Standards
- K.G.4
Analyze and compare two- and three-dimensional shapes, using informal language to describe their similarities, differences, and attributes.
- 3.G.1
Use attributes of quadrilaterals to classify rhombuses, rectangles, and squares. Understand that the shared attributes can define a larger category (e.g., quadr...
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