Welcome! The Desmos Geometry Tool is a powerful and interactive workspace that allows you to visualize and explore plane geometry through construction, measurement, transformations, and more! Get started with the tips below, or check out the Geometry User Guide.
Creating Your First Construction
When you visit the Geometry tool, you’ll see the four main components:
The Geometry toolbar is the menu along the top containing all of the available construction tools. You can use these tools to construct points, various types of lines, circles, angles, and polygons. You can also select items with the select tool to edit or transform them.
The graph paper is where construction takes place. You can insert items into this space using the geometry toolbar or the expression list. Items on the graph paper are dynamic. For example, with the select tool, you can click draggable points to move them and see how that movement affects the overall construction. You can also pan with the mouse and zoom with the zoom buttons.
The token navigator is at the top of the expression list (to the right of the ‘add item’ button). Here, you can see token references for the objects you construct on the graph paper. Hover over hidden tokens to reveal the location of those objects or select tokens to change the object's properties. You can also click and drag a token into the expression list to work with it algebraically or give it a name.
The expression list is the panel on the left side of the screen where you can enter expressions and functions. If you’re familiar with the Desmos Graphing Calculator, you’ll notice this part is the same! You can see a list of available functions by opening the Desmos keyboard on the bottom left. Functions specific to geometry can be found under the headings ‘geometry tools,’ ‘properties & measurements,’ and ‘transformations.’ In the Geometry User Guide, you will find a list of available functions, the arguments they take, and an example of each.
Save and Share Your Construction
You can save your constructions to view and edit them later by clicking the blue ‘save’ button on the top left next to the construction title. If you press the save button while signed out, you will be prompted to sign in or create an account. You can also access all of your previously saved constructions by clicking the hamburger button on the top left.
Share your construction by clicking on the ‘share graph’ button in the top right corner next to your account name. Use this menu to copy your construction’s unique link. You can send this link to anyone, and they’ll be able to see your construction.