Triangle class

A triangle defined by three vertices a, b, and c.

Implements Shape and provides classification checks (right, equilateral, isosceles, scalene, acute, obtuse), special points (centroid, circumcenter, incenter, orthocenter), and inscribed/circumscribed circle computation.

final t = Triangle(Point(0, 0), Point(4, 0), Point(2, 3));
print(t.area);        // 6.0
print(t.isAcute);     // true
print(t.centroid);    // Point(2, 1)
Implemented types

Constructors

Triangle(Point a, Point b, Point c)
Creates a triangle from three vertices.
const
Triangle.equilateral({required Point center, required double radius})
Creates an equilateral triangle inscribed in a circle with given center and radius.
factory

Properties

a → Point
First vertex.
final
AB → Line
Line that goes from a to b;
no setter
AC → Line
Line that goes from a to c;
no setter
angles → List<Rad>
Interior angles at vertices a, b, c in radians.
no setter
area → double
Area of this shape.
no setteroverride
b → Point
Second vertex.
final
baseLine → Line
Get baseLine of this triangle
no setter
BC → Line
Line that goes from b to c;
no setter
c → Point
Third vertex.
final
CA → Line
Line that goes from c to a;
no setter
centroid → Point
Get centroid of this triangle
no setter
circumcenter → Point
Get circumcenter of this triangle
no setter
circumscribedCircle → Circle
Get the circumscribed circle (circumcircle)
no setter
hashCode → int
The hash code for this object.
no setterinherited
height → double
Get height value of this triangle
no setter
heightLine → Line
Get height Line
no setter
hypotenuse → Line
Get hypotenuse
no setter
incenter → Point
Get incenter of this triangle
no setter
inscribedCircle → Circle
Get the inscribed circle (incircle)
no setter
isAcute → bool
Check is this triangle is Acute
no setter
isEquilateral → bool
Check is this triangle is equilateral
no setter
isIsosceles → bool
Check is this triangle is Isosceles
no setter
isObtuse → bool
Check is this triangle is Obtuse
no setter
isRightTriangle → bool
Check if this triangle is right
no setter
isScalene → bool
Check if this triangle is scalene
no setter
orthocenter → Point
Get orthocenter of this triangle
no setter
perimeter → double
Perimeter (circumference) of this shape.
no setteroverride
posVertex → Point
Pos vertex
no setter
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
sides → List<Line>
Get 3 sides of this triangle
no setter
vertices → List<Point>
Get list of 3 vertices of this triangle
no setter

Methods

contains(Point p) → bool
Check if a point is inside this triangle
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
rotate(double deg) → Triangle
Rotate all vertices by deg degrees around the origin.
override
scale(double value) → Triangle
Scale all vertices by value.
override
toString() → String
A string representation of this object.
inherited
translate({double x = 0, double y = 0}) → Triangle
Translate all vertices by x horizontally and y vertically.
override

Operators

operator ==(Object other) → bool
The equality operator.
inherited