# Geometry Basics for Free

Learn how lines and shapes interact and the math used to describe them with the learning resources listed here. Find geometric proofs, problems, answers, figures, geometry theorems, and other geometry topics here, either as printable worksheets, practice tests, books, online math games, or more.

### 2nd Grade Math Worksheets: Geometry

2nd | Worksheet/PrintableOur grade 2 geometry worksheets focus on deepening students understanding of the properties two dimensional shapes, including the concepts of congruency, symmetry, area and perimeter. We also...

### Analytic Geometry

6th - 9th | Online classIn analytic geometry, also known as coordinate geometry, we think about geometric objects on the coordinate plane. For example, we can see that opposite sides of a parallelogram are parallel by by...

### Basic geometry

3rd - 7th | Online classLet’s draw points, lines, line segments, and rays. We’ll also think about perpendicular and parallel lines and identify these in two-dimensional figures. Common Core Standard: 4.G.A.1

### California Standards Test for Geometry

7th - High School | Online classSal does the 80 problems from the released questions from the California Standards Test for Geometry. Basic understanding of Algebra I necessary.

### Curriki Geometry

9th - High School | Online resourceThis collection includes resources that are used throughout the six projects of Curriki Geometry. Curriki is grateful for the tremendous support of our sponsor, AT&T Foundation. Our TeamCurriki...

### Free Geometry Worksheets

7th - High School | Worksheet/PrintableLarge selection of free printable Geometry worksheets.

### Geoboard

Kindergarten - 3rd | iPhone/iPadGeoboard is a tool for exploring a variety of mathematical topics introduced in the elementary and middle grades. Learners stretch bands around the pegs to form line segments and polygons and make...

### Geometry

4th - 6th | Online classWe’re going to stick our toes into the proverbial waters of geometry! For those of you that are visual learners you’ll love this topic. We’ll examine all kinds of lines and shapes in the 1st, 2nd,...

### Geometry

Kindergarten - 2nd | Online classLearn how different shapes have different numbers of corners, different side lengths, and so on. Use these properties to help you recognize shapes.

### Geometry

4th - High School | Online classRoughly 2400 years ago, Euclid of Alexandria wrote Elements which served as the world’s geometry textbook until recently. Studied by Abraham Lincoln in order to sharpen his mind and truly...

### Geometry

3rd - 6th | Online classLet’s draw points, lines, line segments, and rays. We’ll also think about perpendicular and parallel lines and identify these in two-dimensional figures. Common Core Standard: 4.G.A.1

### Geometry

5th - 7th | Online classLearn how to find the area, volume, and surface area of all sorts of geometric shapes. Also work with shapes on the coordinate plane.

### Geometry

6th - 9th | Online resourceIf you like playing with objects, or like drawing, then geometry is for you! Geometry can be divided into: Plane Geometry is about flat shapes like lines, circles and triangles … shapes that can be...

### Geometry

7th - 9th | Online classWelcome. I’d like to introduce you to Mr. Angle. Nice to meet you. So nice to meet you. This tutorial introduces us to angles. It includes how we measure them, how angles relate to each other and...

### Geometry

5th - High School | Online resourceFree, interactive video lessons on geometry! The mathematics of lines, shapes, and angles. Essential stuff for describing the world around you.

### Geometry Aligned to CCSS-M Standards

9th - High School | Online resourceThis collection contains resources for a high school course in Geometry. The resources are organized by Common Core State Standards for Mathematics and reflect a ninth or tenth grade course. Both...

### Geometry Content Inventory

9th - High School | Online resourceVirtual Nerd’s patent-pending tutorial system provides in-context information, hints, and links to supporting tutorials, synchronized with videos, each 3 to 7 minutes long. In this non-linear...

### Geometry Course

High School | Online resourceGeometry covers points, lines, planes, angles, parallel lines, triangles, similarity, trigonometry, quadrilaterals, transformations, circles and area. The material is text and video lectures, but...

### Geometry Help

5th - 9th | Online resourceNeed some geometry help? We have more than thirty excellent geometry lessons here, broken up in general topics. Make sure to browse all of the topics to find what you need, or search by keyword.

### Geometry Lesson Series

6th - High School | Online resourceStudents use the geometry lessons in this series to explore and learn essential geometric postulates, theorems, and formulas through video and text. Students will confirm their learning with...

### Introduction to Geometry Playlist

6th - College | Online/YouTube videothenewboston Official Introduction to Geometry Playlist!

### Measurement and geometry

2nd - 4th | Online classIn 2nd grade, you learned to measure lengths. Now we can measure the length around the edge of an object (perimeter) and how much “space” something takes up on a flat surface (area).

### Preschool Geometry Worksheets

Pre-K | PrintablePreschool shapes worksheets are the perfect way to teach your child about all the different kinds of shapes. Try our preschool shapes printables with your kid.

### RWM103: Geometry

6th - High School | Online classUnit 1: The Basics of Geometry From a young age, we learn basic vocabulary and basic concepts that lead us to understand greater concepts. In this unit, you will learn about the basic building...

### Special properties and parts of triangles

9th - College | Online classIn this tutorial, we study lines that are perpendicular to the sides of a triangle and divide them in two (perpendicular bisectors). As we’ll prove, they intersect at a unique point called the...

### Tools of geometry

6th - 9th | Online classRoughly 2400 years ago, Euclid of Alexandria wrote Elements which served as the world’s geometry textbook until recently. Studied by Abraham Lincoln in order to sharpen his mind and truly...

### Transformations, congruence, and similarity

9th - College | Online classLearn about geometric transformations and how they’re used to understand the meaning of “similar” and “congruent”.