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Understanding Categories of Shapes

3.G.1
Answer Keys Here

Aligned To Common Core Standard:

Grade 3 Geometry - 3.G.1

These worksheets will help students learn to sort shapes into categories based on shared features. What Are the Different Categories of Shapes? The two categories of shapes that exist include two-dimensional and three-dimensional shapes. All the shapes in the world, lie within these two-categories. Two-Dimensional Shapes - The first category of shapes that you need to understand is the two-dimensional shape. These are shapes that have a length and width but no depth. You can calculate the area and perimeter of these shapes. The sub-categories a) Polygons - Polygons are shapes with line segments that join at their endpoints. Quadrilaterals, squares, rectangles, parallelograms, trapezoid, and rhombus are some of the polygons that every kid should know about. b) Non-Polygons - A shape that is not made of line segments fall under the category of non-polygons. Non-polygons may consist of arc lengths or segments that intersect at a point other than the endpoint, such as a square without the fourth side. A circle and a semi-circle are types of non-polygons. c) Three-Dimensional Shapes - A three-dimensional shape is a solid figure that has a length, width, and depth. All objects in our daily lives have a thickness or a depth and are three-dimensional. You can calculate the surface area and volume of these shapes. Cube, prism, sphere, cone, and cylinder are the types of three-dimensional shapes.

Printable Worksheets And Lessons




Homework Sheets

We start to introduce some really neat shapes into your world.

  • Homework 1- In an equilateral triangle, all sides have the same length. An equilateral triangle is also a regular polygon with all angles measuring 60°
  • Homework 2- Two dimensional shapes are shapes that only have 2 length measures and three dimensional shapes have 3 length measures.
  • Homework 3- Here we have to name and color the shapes.



Practice Worksheets

Did you know that a "dodecagon" fits into this standard? I didn't until began to write this section.

  • Practice 1- Which of the following has 7 sides?
  • Practice 2- Name the shapes and state which are two-and three dimensional.
  • Practice 3- Name and color the shapes.



Math Skill Quizzes

We work further on the vocabulary of shapes.

  • Quiz 1- How many circles are there in the below shapes?
  • Quiz 2- How many sides are there in the parallelogram?
  • Quiz 3- How many sides are there in a triangle?