To join two points with a segment, proceed, alternatively, as follows:
The two points must belong to the same face.
If a dialog pops up, fill in the points and click OK.
This action can be undone.
See also:
To draw a perpendicular through a point to a segment, proceed, alternatively, as follows:
The point and the segment must belong to the same face. The point may or may not belong to the segment.
If a dialog pops up, fill in the points and click OK.
If the point and the segment belong to two different faces at the same time, a second dialog may pop up. Select a face from the list and click OK.
This action can be undone.
See also:
To divide a segment in a given ratio, proceed, alternatively, as follows:
A dialog will pop up. Fill in, if necessary, the points and valid expressions for the numerator and denominator of the ratio. Click OK.
The ratio is defined as AX : XB, where X is the division point, AB the segment. For example, if the ratio is 1 : 2, X will be twice closer to A than to B. If the ratio is 3 : 1, X will be three times closer to B than to A.
The midpoint divides the segment in ratio 1 : 1 and therefore can be drawn as shown above. However, a convenience Draw Midpoint action offers a shortcut.
This action can be undone.
See also:
To draw the midpoint of a segment, proceed, alternatively, as follows:
A dialog may pop up. Fill in, if necessary, the points. Click OK.
Note that drawing the midpoint is equivalent to dividing the segment in ratio 1 : 1.
This action can be undone.
See also:
To divide an angle in a given ratio, proceed, alternatively, as follows:
The segments that make the angle must belong to the same face and not be collinear.
A dialog will pop up. Fill in, if necessary, the points and valid expressions for the numerator and denominator of the ratio. Click OK.
The ratio is defined as <AOX : <XOB, where OX is the division segment, <AOB the angle. For example, if the ratio is 1 : 2, OX will make with OB a twice greater angle than with OA. If the ratio is 3 : 1, OX will make with OA three times greater an angle than with OB.
The bisector divides the angle in ratio 1 : 1, therefore can be drawn as shown above. However, the convenience Draw Bisector action offers a shortcut.
This action can be undone.
See also:
To draw the bisector of an angle, proceed, alternatively, as follows:
The segments that make the angle must belong to the same face and not be collinear.
A dialog may pop up. Fill in, if necessary, the points. Click OK.
Note that drawing the bisector is equivalent to dividing the angle in ratio 1 : 1.
This action can be undone.
See also:
To draw the intersection point of the lines containing two given segments, proceed, alternatively, as follows:
Both segments, as well as the intersection point of their lines, must belong to the same face.
A dialog may pop up. Fill in, if necessary, the points. Click OK.
This action can be undone.
See also:
To draw a point on a given segment at a given distance from a given point, proceed, alternatively, as follows:
The point and the segment must belong to the same face. The point may or may not belong to the segment.
A dialog will pop up. Fill in, if necessary, the points and a valid expression for the distance. Click OK. Select a notepad record ahead of time to have it copied automatically to the distance input box.
This action may result in the construction of one or two distinct points.
This action can be undone.
See also:
To draw a segment from the end point of another segment so that the two segments make a given angle, proceed, alternatively, as follows:
A dialog will pop up. Fill in, if necessary, the points and a valid expression for the angle. Click OK. Select a notepad record ahead of time to have it copied automatically to the angle input box.
The angle must be greater than 0 and less than 180 degrees and be entered in radians, as opposed to degrees. For example, to lay an angle of 60 degrees, enter PI/3.
If the segment belongs to two different faces at the same time, a second dialog may pop up. Select a face from the list and click OK.
This action may result in the construction of one or two distinct segments.
This action can be undone.
See also:
The problem creator can rename a point in a figure by selecting Rename Point from the Draw menu.
A dialog will pop up. Enter the old and the new labels for the point in question and click OK. A valid label consists of a capital letter, which may be followed by one or more digits.
Select a point ahead of time to have it automatically copied into the input box.
Renaming a point may result in some of the notepad records being updated accordingly.
This action can be undone.
See also:
To erase a segment or its part, select Erase Segment from the Draw menu. The segment cannot belong to an edge.
If a dialog pops up, fill in the points and click OK.
Note that a whole segment can be more conveniently erased by selecting it and performing the Erase Selection action.
Erasing a segment that has been referenced in measurements will result in some of the variables being pinned.
This action can be undone.
To erase one or more elements, such as points and/or segments, select them and proceed, alternatively, as follows:
Vertices and segments that belong to edges will not be erased.
To erase all points and segments in a figure (with the exception of vertices and edges), select them all first.
To erase only a part of a drawn segment, use the Erase Segment action.
Erasing elements that have been referenced in measurements will result in some of the variables being pinned.
This action can be undone.
See also: