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## com.vividsolutions.jts.geom
Class Triangle

    java.lang.Object
      com.vividsolutions.jts.geom.Triangle

public class Triangle
extends java.lang.Object

Represents a planar triangle, and provides methods for calculating various properties of triangles.

Version:
  1.7

Field Summary
`Coordinate` | `p0`
`Coordinate` | `p1`
`Coordinate` | `p2`

Constructor Summary
`Triangle(Coordinate p0, Coordinate p1, Coordinate p2)`

Method Summary
`static Coordinate` | `angleBisector(Coordinate a, Coordinate b, Coordinate c)` Computes the point at which the bisector of the angle ABC cuts the segment AC.
`static double` | `area(Coordinate a, Coordinate b, Coordinate c)` Computes the area of a triangle.
`static Coordinate` | `centroid(Coordinate a, Coordinate b, Coordinate c)` Computes the centroid (centre of mass) of a triangle.
`static Coordinate` | `circumcentre(Coordinate a, Coordinate b, Coordinate c)` Computes the circumcentre of a triangle.
`Coordinate` | `inCentre()` Computes the incentre of a triangle.
`static Coordinate` | `inCentre(Coordinate a, Coordinate b, Coordinate c)` Computes the incentre of a triangle.
`static boolean` | `isAcute(Coordinate a, Coordinate b, Coordinate c)` Tests whether the triangle is acute.
`static double` | `longestSideLength(Coordinate a, Coordinate b, Coordinate c)` Computes the length of the longest side of a triangle
`static HCoordinate` | `perpendicularBisector(Coordinate a, Coordinate b)` Computes the line which is the perpendicular bisector of the line segment a-b.

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Field Detail

### p0

    public Coordinate p0

### p1

    public Coordinate p1

### p2

    public Coordinate p2

Constructor Detail

### Triangle

    public Triangle(Coordinate p0,
                    Coordinate p1,
                    Coordinate p2)

Method Detail

### isAcute

    public static boolean isAcute(Coordinate a,
                                  Coordinate b,
                                  Coordinate c)

  Tests whether the triangle is acute. A triangle is acute iff all interior angles are acute.

  Parameters:
    `a` - a vertex of the triangle
    `b` - a vertex of the triangle
    `c` - a vertex of the triangle
  Returns:
    true if the triangle is acute

### perpendicularBisector

    public static HCoordinate perpendicularBisector(Coordinate a,
                                                    Coordinate b)

  Computes the line which is the perpendicular bisector of the line segment a-b.

  Parameters:
    `a` - a point
    `b` - another point
  Returns:
    the perpendicular bisector, as an HCoordinate

### circumcentre

    public static Coordinate circumcentre(Coordinate a,
                                          Coordinate b,
                                          Coordinate c)

  Computes the circumcentre of a triangle. The circumcentre is the centre of the circumcircle, the smallest circle which encloses the triangle.

  Parameters:
    `a` - a vertx of the triangle
    `b` - a vertx of the triangle
    `c` - a vertx of the triangle
  Returns:
    the circumcentre of the triangle

### inCentre

    public static Coordinate inCentre(Coordinate a,
                                      Coordinate b,
                                      Coordinate c)

  Computes the incentre of a triangle. The inCentre of a triangle is the point which is equidistant from the sides of the triangle. It is also the point at which the bisectors of the triangle's angles meet. It is the centre of the incircle, which is the unique circle that is tangent to each of the triangle's three sides.

  Parameters:
    `a` - a vertx of the triangle
    `b` - a vertx of the triangle
    `c` - a vertx of the triangle
  Returns:
    the point which is the incentre of the triangle

### centroid

    public static Coordinate centroid(Coordinate a,
                                      Coordinate b,
                                      Coordinate c)

  Computes the centroid (centre of mass) of a triangle. This is also the point at which the triangle's three medians intersect (a triangle median is the segment from a vertex of the triangle to the midpoint of the opposite side). The centroid divides each median in a ratio of 2:1.

  Parameters:
    `a` - a vertex of the triangle
    `b` - a vertex of the triangle
    `c` - a vertex of the triangle
  Returns:
    the centroid of the triangle

### longestSideLength

    public static double longestSideLength(Coordinate a,
                                           Coordinate b,
                                           Coordinate c)

  Computes the length of the longest side of a triangle

  Parameters:
    `a` - a vertex of the triangle
    `b` - a vertex of the triangle
    `c` - a vertex of the triangle
  Returns:
    the length of the longest side of the triangle

### angleBisector

    public static Coordinate angleBisector(Coordinate a,
                                           Coordinate b,
                                           Coordinate c)

  Computes the point at which the bisector of the angle ABC cuts the segment AC.

  Parameters:
    `a` - a vertex of the triangle
    `b` - a vertex of the triangle
    `c` - a vertex of the triangle
  Returns:
    the angle bisector cut point

### area

    public static double area(Coordinate a,
                              Coordinate b,
                              Coordinate c)

  Computes the area of a triangle.

  Parameters:
    `a` - a vertex of the triangle
    `b` - a vertex of the triangle
    `c` - a vertex of the triangle
  Returns:
    the area of the triangle

### inCentre

    public Coordinate inCentre()

  Computes the incentre of a triangle. The inCentre of a triangle is the point which is equidistant from the sides of the triangle. It is also the point at which the bisectors of the triangle's angles meet. It is the centre of the incircle, which is the unique circle that is tangent to each of the triangle's three sides.

  Returns:
    the point which is the inCentre of the triangle

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