Curated OER
Partitioning a Hexagon
The task at hand is to partition a hexagon into two, four, and eight congruent figures. Make sure to give your wizards a sheet of triangle grid paper on which to decompose the hexagons. Have them explain which rotations, reflections, or...
Curated OER
2-Dimensional Shapes: Drawing Shapes
Some of the best practice with shape identification comes from drawing the figures first-hand. Young geometers draw nine two-dimensional shapes: rectangle, circle, square, pentagon, hexagon, octagon, triangle with three equal sides,...
Curated OER
Making Two-Dimensional Shapes
Find the shapes that fit. Pupils explore visual discrimination in a set of geometry worksheets, which has them examine shapes that have been divided in half. They observe a set of shapes to determine which of them would fit into each...
Curated OER
Making Two-Dimensional Shapes
Which shapes fit? Learners practice visual discrimination using a geometry learning exercise, which has them examine shapes that have been divided in half. They observe a set of shapes to determine which of them would fit into each half...
Curated OER
Making Two-Dimensional Shapes- Matching Worksheet
Now that your learners recognize two-dimensional shapes, can they find what each half of those shapes would look like? There are seven shapes on this worksheet, bisected by a dotted line. Scholars examine these shapes and match them to a...
Curated OER
Shapes
Fifth graders explore shapes. They recognize and name two-dimensional and three-dimensional shapes. Pupils discuss the properties and criteria for each shape they find in real life and construct a Kid Pix project using pictures of the...
Curated OER
2-D Geometry
Third graders describe and compare attributes of two-dimensional shapes. They explain geometric terms, angles and shapes. Students demonstrate each vocabulary word with their body and they mirror the body positions associated with each...
Curated OER
Explore Three-Dimensional Shapes
Students are assigned to shape groups and explore three-dimensional shapes. They review math skills and two-dimensional shapes.
Curated OER
Shape & Form
Learners analyze the difference between shape and form. They identify, explain and use the basic elements of design and determine that forms are three-dimensional and shapes are two-dimensional. They sketch it on their paper and then...
Curated OER
Tetrominoes Cover-Up
Third graders are given square tiles and participate in a demonstration on how to arrange them. Using the tiles, they work with a partner to discover how many two-dimensional tetrominoes they can create. To end the lesson, they must...
CK-12 Foundation
Ck 12: Geometry: Area and Volume of Similar Solids
[Free Registration/Login may be required to access all resource tools.] In this lesson students gain an understanding of scale relationships of area and volume. Students examine guided notes, review guided practice, watch instructional...
Shodor Education Foundation
Shodor Interactivate: Cross Sections
This activity utilizes the concepts of cross-sections of three-dimensional figures to demonstrate the derivation of two-dimensional shapes.
National Council of Teachers of Mathematics
Nctm: Figure This: Decorating Boxes
How do you print a ribbon on a box? The challenge is to figure out which of the patterns can be folded into a box with an orange ribbon printed all the way around it?
PBS
Pbs Mathline Lesson: Geometry, It's a Perfect Fit [Pdf]
This two-part geometry lesson plan has learners identify, describe, and classify two-dimensional shapes. Students engage in hands-on activities including identifying shapes in the classroom, creating patterns with shapes, identifying...