Help for KwikTrig Geometry
The Cartesian (also known as Rectangular) coordinate system is used to place objects in the geometry window. The point where the horizontal and vertical lines meet is known as the origin. The horizontal line is the X axis, values to the left of the origin are negative (-X), values to the right are positive (X). The vertical line is the Y axis, values below the origin are negative (-Y), and values above are positive (Y).
The picture below is what you see when you open the Geometry module. Move your cursor over the button or menu item you need help with and "click".
Download this help file.
Create a Circle
Diameter: If you know the diameter no further action is required. If all you know is the radius, just check the This is the Radius box and it will be converted to the diameter. After giving the coordinates for the circle hit Enter on your keyboard. If you can't see it, click the Fit button.
A Circle example is here.
Create a Line
Each line needs a start point (X1,Y1) and an end point(X2,Y2). These points are significant as far as angles are concerned. If for example: Start is X1=0, Y1=0, End is X2=0, Y2=1, the resulting angle is 90 degrees. But if: Start is X1=0, Y1=1, End is X2=0, Y2=0, the resuling angle is 270 degrees.
Check Begin next line here to begin a new line at the previous line's ending point.
A Line example is here.
Create a Point
Places a point in the window. A point appears as an X.
A Point example is here. The object labeled as #4 is a point.
Connect 2 Entities
Use to find tangent points on a circle. When you have 2 or more objects you can connect them. Connect circles, lines, or points. When connecting an object to a circle, the place where the lines touch the circle are the tangent points of the circle. There are 3 ways to connect objects.
(1.) In the Connect box, click on the name of the first object and enter the number. Then in the To box do the same.
(2.) Use the right mouse button to drag over the first object, that object will then turn green. Repeat this on the second object.
(3.)Move the cursor close to the first object. When the object turns orange right click it, the object changes color to indicate it was chosen. Repeat this process for the second object.
The entities are now connected. Choose to keep one, none or all connecting lines.
An example is here.
Circle Tangent to Angle
Use to find the center of a circle that is tangent to an angle. Where two lines touch or cross they also intersect. This intersection creates an angle. KwikTrig detects intersecting lines and the point of intersection. Choose a pair of these lines to place a circle tangent to their angle.
The first example shows some intersecting lines. I have chosen a circle with a diameter of .500 of an inch and will place it at the angles formed by the intersection of lines #3 and #7.
The second example shows the circle placed at all possible locations. In the Keep frame click on the number of the circle you want to keep and the rest will disapear. Keep 1, All or Cancel for none.
The third example shows the result of my choice.
Each time this button is clicked all objects will be enlarged by 2x.
Each time this button is clicked all objects will be reduced by 2x.
Fit in Window
Click this button to make all objects fit in the window.
Click this button or the Remove button to delete an object or objects that are highlighted in red. There are two ways to delete an object or objects.
(1.)This can be difficult with lines. To delete a single object, slowly move the cursor toward the object. The object will first turn orange, when information about the object appears click the left mouse button. The object turns red and the Delete Entity and Remove buttons become active. Click either of these buttons to remove the object.
(2.)This is much easier. To delete a single or multiple objects. Using the left mouse button, drag over the object or objects you want to remove.The object or objects turn red and the Delete Entity and Remove buttons become active. Click either of these buttons to remove the object.
Places chosen object at the coordinates specified. Use your mouse to click, or hit the Enter key on your keyboard.
Allows you to open another KwikTrig module without losing information in the current module. When you come back to the geometry module your project is still there.
Use any unit of measurement to place objects and find your answers. If you are using Inch or Millimeters, you can convert information in the picture box and geometry report from one unit of measurement to the other and back again if you choose. When you open the geometry module Inch units is the default. If you plan to convert this project to another unit of measurement be careful that you have checked the correct unit before you start your project.
This example shows Inches to be the chosen unit of measurement.
Opens a sizeable window containing all the information about the objects in the geometry window. This view displays information on circle #15 from Circle Tangent to Angle third example.
View of About.
View of User Key.