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Middle Grades Math

Geometry

In this unit, students will explore how two-dimensional figures and their images are related under translations, rotations, reflections and dilations. Similarity and congruence will also be investigated. Students will identify the relationships between angles formed by intersecting lines and angles created when a transversal intersects parallel lines. Students will solve problems involving the area and circumference of a circle and investigate two-dimensional cross-sections of three-dimensional figures. Students will solve real-world problems involving surface area and volume of cubes, right prisms, cones, cylinders and spheres. Students will explore the Pythagorean Theorem and its converse.

This unit was developed from the Common Core State Standards. For more information download the unit guide (on the right) where the specific content standard is identified. There may be other CCSS that align to the activities as well that are not referenced on the guide.

Middle Grades Math: Geometry Activities

Title Type

Scaling the Geometry

This lesson involves scale drawings of actual images on the TI-Nspire handheld.

Alignments  Standards  |  Textbook  
  • 2131

Slices

This lesson involves exploring the shapes formed from 3D figures cut by a horizontal and/or a vertical plane. • Compatible TI Technologies: TI-Nspire™ CX Handhelds, TI-Nspire™ Apps for iPad®, TI-Nspire™ Software

Alignments  Standards  |  Textbook  
  • 2169

Getting "A-Round" Area

This lesson involves using sectors of a circle to form a parallelogram and, from this shape, investigating the area formula for a circle.

Alignments  Standards  |  Textbook  
  • 2222

Angles for a Solution

This lesson involves looking at several sketches of intersecting lines and determining the measures of the missing angles using the facts about supplementary, complementary, vertical, and adjacent angles.

Alignments  Standards  |  Textbook  
  • 2272

We've Got You Covered: 2D Area

This lesson involves using the geometry tools to measure the area of two-dimensional shapes from the faces of three-dimensional objects they see in pictures taken outside of the classroom.

Alignments  Standards  |  Textbook  
  • 2165

The Pentagon Problem

This activity provides a simple, virtual "geoboard" that allows students to manipulate the polygon displayed on a unit grid. The grid squares provide a visual means of finding area.

Alignments  Standards  |  Textbook  
  • 2055

Transformers in the Classroom

This lesson involves digitizing an image and transforming it on a graph.

Alignments  Standards  |  Textbook  
  • 2055

What's Right about Triangles

This lesson involves examining a visual proof of the Pythagorean Theorem and supporting what happens geometrically.

Alignments  Standards  |  Textbook  
  • 2276

Volume Relationships

This lesson involves the volume formula for cylinders, cones, and spheres.

Alignments  Standards  |  Textbook  
  • 2382
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