Study Guide

Basic Geometry Introduction

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Basic Geometry Introduction

Who put Geometry in my Pre-Algebra and who put Pre-Algebra in my Geometry? It's like one of those serendipitous accidents: Geometry and Pre-Algebra actually go together. Geometry rocks. It's fun. Cool, even. There, we said it.

If you're not a fan of numbers, then geometry still might win you over to math. It has intriguing puzzles, interesting real-world uses, and beautiful 2-D and 3-D shapes. (No uncomfortable 3-D glasses required!)

Basic Geometry Resources

Geometry Bingo
This Bingo style game will help you memorize all those confusing polygon and basic geometry terms.

What's my angle?
This is a nifty tool to help measure angles. The make-an-angle tool is really nice for teaching you how to use a protractor!

Help the robot destroy UFO’s with this silly little game that classifies angles as acute, obtuse, or right.

Geometric Matching
Use this matching game to practice classifying different types of triangles.

Angle Sums
Explore the sum of the interior angles of polygons from triangles to octagons.

Dynamic Paper
This dynamic paper is a great source for teachers and students. You can create geometric figures, nets, tesselations, number lines, grids, spinners, and graph paper and download it to your computer to print. A very neat tool!

Shape Sorter
Sort shapes into Venn diagrams according to their angles and sides.

Shape Tool
Reflect, rotate, and translate different polygons using this tool.

Blow 'em up cartoons
This is a lesson plan for teachers or parents to use to teach similar figures. In this activity, you will blow up a cartoon character and draw it using grids.

Similar and Congruent Figures
Sort the pairs of shapes as congruent, similar, or neither.

Interactive Geometry Dictionary
This is a nice visual representation of the areas of rectangles, parallelograms, and triangles. It would be a nice addition to a teacher-led demonstration on area.

Area Tool
This tool allows students to discover the formulas for area of trapezoids, parallelograms, and triangles by changing their height and base.

Circle Tool
See how area and circumference of a circle relate in this interactive lesson. This exploration has it all: guided teaching, student discovery, and practice problems!

Computing Pi
Two visual representations of how to compute pi.

Cube Nets
Which of these nets will form a cube?

Geometric Solids
Explore the relationship between the number of faces, edges, and vertices of various geometric solids using this tool.

Isometric Drawing Tool
Construct images of 3D figures using this nifty drawing tool.

Proof Without Words: Pythagorean Theorem
A look at how the Pythagorean Theorem works. This is probably best as a teacher-led lesson.

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