Flat and Solid Shapes Worksheet
The worksheet presents a mixed set of plane and solid shapes, each identified by a letter. Learners place those letters into four categories: flat, solid, has corners, and no corners. They then count how many shapes belong in each category, adding a numerical summary to the classification. Because corner status and dimension are separate properties, figures may be considered under more than one heading. A geometric classification reference supports verification.

- Grades
- K–2
- File type
- Preparation
- Print ready
- Subject
- Geometry, Math
- Topic
- Shapes, Solid Shapes and Flat Shapes
- Resource types
- Worksheets, Worksheets & Printables
- Preparation
- Print ready
From the author
About this resource
This worksheet is great for helping students sort shapes into different categories based on specific shape attributes.
In the classroom
Teaching tips & learning objectives
Learning objectives
Classify a shape as flat or solid
Determine whether a figure has corners
Count members assigned to a geometric category
Teaching tips
Complete flat-versus-solid first, then revisit the same figures for corner status.
Ask why the category totals need not add to the number of unique shapes.
Skills covered
Shape classification — figures are grouped by dimension and corners.
Attribute reasoning — separate properties are applied to the same set.
Category counting — learners total each completed group.
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Resource details
Concepts & topics
Core concepts
Flat shapes
Solid shapes
Corners
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