C.a.R. Icon Help
| General Directions: Move/Resize the applet Click once on the applet. Use the arrow keys on your keyboard to move the entire sketch. Use the + or - keys to zoom in or out. Using the toolbar (button bar) If no buttons exist on the toolbar, then most likely there are points on the sketch that can be moved (dragged). Click and drag on a point. To determine the name of a button, move the cursor but do not click and the name of the button will appear. There are two ways to "get out of trouble". 1. The  "Delete Last Object" ( or "undo") button will remove mistakes.2. "Refresh" the browser (control R) will reload the page which will restart the applet from the beginning. Scroll down to learn more about a specific button. |
C.a.R. Buttons/Icons
- Commonly Used Tools: click on the icon to practice the use of the tool.
a free, movable point that can be fixed immediately by holding down the shift key
a line segment between two points
a ray between two points
a line through two points
a circle around a point through another point
a circle around a point with a radius equal to the distance of two other points
The center is chosen as last point
the intersection between two lines, a line and a circle, or two circles
Either the two objects (generates both intersection points), or one of the intersection points (if there are two) can be selected.
Moves a point.- Deletes the last construction step.
- Shortcut Tools:
a parallel line to a line through a point
a line perpendicular to a line through a point
the middle point between two points
- Editing Tools:
Edit the properties of a object.
Create an expression. You can use an arithmetic expression to set coordinates of points, lengths of segments, radii of circles, and sizes of angles.
This will show names of objects.
This will show values - measures, distances, or coordinates of objects.
- Other Tools:
a point on a circle or a line (or a segment, or a ray)
Filled polygon
The last point must be selected twice to stop the selection.
Use the mouse to draw on the construction.
You can enter a function or curve. Simple functions have "x" as x-value and an expression of x as y-value. They will be drawn into the construction window.
will display a Grid
Use the mouse to zoom in or out.
Angle through three points. The middle point is the vertex of the angle.
Replay a construction. Return to first step.
Replay a construction. Go to next step.
Replay a construction. Go to last step.
| Name | Example | Description |
|---|---|---|
+, -, *, /, or ^ |
3.5*3+3/(4-5^2) |
Basic computations |
Comparison of objects |
AB/CD |
the ratio of segments Other objects can be used in expressions. |
Function |
sin(a) |
the functions abs, sign, sin, cos, tan, arcsin, arccos, arctan, sqrt, exp, log, round, ceil, floor, angle180 and angle 360 |
d |
d(P,Q) |
returns the distance of two points. |
a |
a(P,Q,Z) |
returns the measure of angle PQZ. |