CENTROID
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The center of gravity of a triangle, where the three medians of the triangle intersect
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ORTHOCENTER
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The orthocenter of a triangle is the point
where all three of its altitudes intersect.
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CIRCUMCENTER
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The point where the three perpendicular bisectors of the
sides of a triangle meet
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CIRCUMCIRCLE
|
The circumcircle or circumscribed circle
of a polygon is a circle which passes through all the
vertices of the polygon. The center of this circle is called the circumcenter.
|
INCENTER
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The incenter of a triangle or regular
polygon is the point where the angle bisectors meet.
|
INCIRCLE
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It is the largest circle that will fit
inside the triangle.
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MEDIAL TRIANGLE
|
It
is the small triangle with vertices at the midpoints of a bigger triangle
|
MID-SEGMENT TRIANGLE
ORTHOCENTER
|
A midsegment of a triangle is a segment connecting the
midpoints of two sides of a triangle.
|
ORTHIC TRIANGLE
|
The triangle joining the feet of the
altitudes of a triangle is called the orthic triangle. |
PEDAL TRIANGLE
|
The pedal triangle is the triangle
whose vertices are the feet of the perpendiculars from the point to the sides
of the given triangle. |
NINE POINT CIRCLE
|
It is a circle that
passes through nine significant concyclic
points defined from the triangle |
CENTER OF THE NINE
POINT CIRCLE
|
The center of the circle defined above |
TRISECTING A LINE
SEGMENT
|
Dividing a segment into three equal
parts |
EQUILATERAL TRIANGLE
GIVEN ONE SIDE
|
Equilateral triangles have equal sides
and angles. Here one is constructed given one side. |
SQUARE GIVEN A SIDE
|
Four equal sides and four ninety
degree angles define a square. Here one is constructed given a side. |
ISOSCELES TRIANGLE
GIVEN BASE AND ALTITUDE
|
Isosceles triangles have two equal
sides and two equal angles. Here one is constructed given a base and altitude |
TRIANGLE CENTERS
|
Orthocenter, Centroid, Circumcenter
and Incenter |
TRIANGLE CENTERS WITH EULER LINES
|
It is a line that passes through several important points determined
from the triangle, including the orthocenter, the circumcenter, the centroid, and the center of the nine-point
circle of the triangle. |
LOCUS VERTEX OF A FIXED ANGLE SUBTENDING A FIXED VERTEX
|
Here one is constructed |
DIVIDE A SEGMENT AB INTO TWO PARTS THAT FORM A GOLDEN RATION
|
Here one is constructed |
PENTAGON GIVEN A RADIUS |
A polygon with five sides and five
angles. Here one is constructed given a radius |
PENTAGON GIVEN A SIDE
|
A polygon with five sides and five
angles. Here one is constructed given a side |
HEXAGON GIVEN A SIDE
|
A polygon with six sides and six
angles. Here one is drawn given a side |
OCTAGON GIVEN A SIDE |
A polygon with eight sides and eight
angles. Here one is drawn given a side |