Object Types

Point

A single labeled point — the basic building block most other Geometry objects snap to.

How to create it:

1. Click to place the point.

Segment

A straight line between two points.

How to create it:

1. Click to set the start (snaps to existing points).
2. Click to set the end.

Dashed Segment

The same as a Segment, drawn with a dashed stroke.

How to create it:

1. Click to set the start (snaps to existing points).
2. Click to set the end.

Circle

A circle defined by its center and a point on its edge.

How to create it:

1. Click to set the center.
2. Click to set a point on the circle — this defines the radius.

Label

A letter label or live measurement attached to an existing point, segment, or angle.

How to create it:

1. Hover over a point, segment, or angle.
2. Click to attach the next free letter label — or Alt-click a segment or angle to attach a live length/angle measurement instead.
3. Click empty canvas to stop placing labels.

Angle

An arc marking the angle between two rays from a shared vertex.

How to create it:

1. Select or place the vertex.
2. Select or place a point on the first ray.
3. Select or place a point on the second ray.

Right Angle

The same three clicks as Angle, but draws the small square right-angle marker instead of an arc.

How to create it:

1. Select or place the vertex.
2. Select or place a point on the first ray.
3. Select or place a point on the second ray.

Segment Length

A dimension line measuring the distance between two points.

How to create it:

1. Click to set the measurement start.
2. Click to set the measurement end.
3. Click to offset the measurement line to either side.

Triangle

How to create it:

1. Click to set vertex 1.
2. Click to set vertex 2.
3. Click to set vertex 3.

Right Triangle

A triangle with a right angle built into its construction.

How to create it:

1. Click to set the first leg's endpoint.
2. Click to set the right-angle vertex.
3. Click to set the second leg's length and side.

Quadrilateral

How to create it:

1. Click to set vertex 1.
2. Click to set vertex 2.
3. Click to set vertex 3.
4. Click to set vertex 4.

Square

How to create it:

1. Click to set vertex 1.
2. Click to set the base.
3. Click to choose which side the square falls on.

Rectangle

The same three-click flow as Square, with each side sized independently.

How to create it:

1. Click to set vertex 1.
2. Click to set the base.
3. Click to choose the rectangle's side.

Parallelogram

How to create it:

1. Click to set vertex 1.
2. Click to set vertex 2.
3. Click to set vertex 3 — the 4th vertex is deduced automatically.

Rhombus

How to create it:

1. Click to set vertex 1.
2. Click to set the side length.
3. Click to choose the second side's direction.

Polygon

A closed shape with as many vertices as you click.

How to create it:

1. Click to add each vertex, in order.
2. Once you have 3 or more vertices, press Enter (or keep clicking) to finish.

Ellipse

How to create it:

1. Select or place the center.
2. Select or place the major-axis point.
3. Select or place the minor-axis point.

Arc

How to create it:

1. Select or place the arc's start point.
2. Select or place the arc's end point.
3. Select or place a point the arc passes through.

Parabola

How to create it:

1. Select or place the parabola's start point.
2. Select or place the parabola's end point.
3. Select or place the vertex.

Tangent

One or both tangent lines from a point to an existing circle.

How to create it:

1. Click an existing point, or place a new one.
2. Click the circle to draw tangents to.
3. Approve each tangent line as it previews (up to 2).

Tangent at Point

A tangent line touching a circle at one specific point.

How to create it:

1. Click the circle to select it.
2. Click the contact point on the circle (snaps to points already on it).
3. Set the first endpoint of the tangent line.
4. Set the second endpoint of the tangent line.

Intersection

A point wherever two existing segments cross.

How to create it:

1. Click the first segment.
2. Click the second segment.

Extend Segment

Extends an existing segment past one of its endpoints.

How to create it:

1. Click the segment to extend.
2. Click along its direction to set how far to extend it.

Perpendicular Drop

A dashed line dropped from a point straight onto a line, with a right-angle marker where it lands.

How to create it:

1. Select the point to drop the perpendicular from.
2. Select the line to drop it onto.

Perpendicular Bisector

How to create it:

1. Select the line segment to bisect.
2. Place the first endpoint of the bisector line.
3. Place the second endpoint of the bisector line.

Angle Bisector

How to create it:

1. Select or place the angle's vertex.
2. Select or place a point on the first ray.
3. Select or place a point on the second ray.
4. Set the bisector's endpoint, or snap it to a side.

Parallel Line

How to create it:

1. Select the line segment to draw parallel to.
2. Click to set how far away the parallel line sits.
3. Click to set the parallel line's start point.
4. Click to set its end point.

Parallel Mark

A small tick on a segment, indicating it's parallel to another marked segment.

How to create it:

1. Hover over a segment.
2. Click to place the mark.

Double Parallel Mark

The same as Parallel Mark, with two ticks instead of one — for a second parallel pair.

How to create it:

1. Hover over a segment.
2. Click to place the mark.

Equal Mark

A small tick on a segment, indicating it's equal in length to another marked segment.

How to create it:

1. Hover over a segment.
2. Click to place the mark.

Double Equal Mark

The same as Equal Mark, with two ticks instead of one.

How to create it:

1. Hover over a segment.
2. Click to place the mark.

Angle Tick

A small tick on an angle's arc, indicating it's equal to another marked angle.

How to create it:

1. Hover over an angle.
2. Click to place the mark.

Double Angle Arc

The same as Angle Tick, drawn as a second arc instead of a tick.

How to create it:

1. Hover over an angle.
2. Click to place the mark.