Course iAssign: Example

This glossary contains some definitions used in geometry

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Angle

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Angle is the union of 2 rays that have the same endpoint; measured in degrees or radians (trig.);

Below we have the BÂC angle. This name tells that A is the vertex.

You can move the points A, B and C to see what happens with the angle's measure.

Bisector

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Bisector is a line that passes exactly "in the middle" of two points.

Bisector is a region whose points are equidistant (same distance) to two points.

In the drawing we see that points A and B have a bisector. Move the points and see what happens with the bisector.

Circumference

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The Circumference is the geometric object that is the region with a given distance (radius) of a certain point (center).

It is used to mark distances in constructions.

Move the points to see how you can control it!

Circumcenter

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The Circumcenter is one of the triangle's notable points.

It is the crossing point of the three bisectrix of the triangle's segments.

It is the center of the Circunscribing Circumference.

Median

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Median is a segment from a vertex of the triangle to the midpoint of its opposite side.

Move the triangle to see where the median goes!

Angle Bisection

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Bisection is a ray that divides an angle in two angles with the same measure.

Move around the points to see what happens to the bisection for different angle's measures.

Barycenter

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The Barycenter is one of the triangle's notable point. It indicates the center of mass of an object.

It is the crossing point of the three medians of the triangle.

You can move the figure below to see what happens to the barycenter when you move around A, B and C.

Incenter

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The Incenter is one of the triangle's notable points.

It is the crossing point of the triangle's angle bisections.

Move the points to see where the Incenter goes when you stretch the triangle!