![]() Load GeoGebra worksheet Drag the blue point. See to it that your construction passes the dragging test. Make an isosceles triangle as a construction.Exercise 4Ī circle has the extraordinary property that all points on the circle have the same distance to the midpoint of the circle. Quadrilateral should still remain a parallelogram when moving the points ‐ it should pass the dragging test. Should be able to move to points to change the size and the appearance the You can also use an image as the icon for the tool. In this case they are already selected.Īs the last step, give a name to your tool. You can make a pentagram-tool under the menu Tools -> Create New Tool.įirst select the pentagram as the output object. Choose Tools - > Customize toolbar to pick out the tools corresponding to a classical ruler and compass. It is possible to use GeoGebra for classical ruler-and-compass-constructions. Here we use the word construction as a construction you can make using all GeoGebra tools. Ruler and compassĪ geometric construction is often understood as a construction made using only a ruler and compass. You can click on the segments either in the graphics view or the algebra view. The same point, don't click on the intersection of the segments but click twice, first on one segmentsĪnd then on the other using the Intersect tool. If you, as in the picture, have three segments intersecting at approximately In that case it may be easier to use the tool Intersect. Sometimes, however, you want an intersection point where several objects intersect. In most cases you can use the tool Point when making an intersection point. ![]() ![]() If an intended intersection point isn't black, you have failed intersecting two objects. When making constructions keep an eye out on the color of the points. Unlike a point on a circle, an intersection point cannot be moved at all and it is by default colored black. Intersection pointsĪn intersection point is a dependent object that depends on the two objects it intersects. Observe the algebra view and choose Sort by: Dependency the point C and the circle cĪre dependent objects. Is defined to be a point on the circle and is hence dependent. The circle is a dependent object, it depends on the points. The circle, these points define the circle.
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