A trangle with vertices, sides and angles

						var board = JXG.JSXGraph.initBoard('box1', {
boundingbox: [-10, 10, 10, -10],showNavigation:false, showcopyright: false, axis: false,
});

var p1 = board.create('point', [-6, -4],{name:"vertex 1",label:{offset:[-50,0]}});
var p2 = board.create('point', [6, -4],{name:"vertex 2",label:{offset:[10,0]}});
var p3 = board.create('point', [2, 7],{name:"vertex 3",label:{offset:[-15,15]}});
var l1 = board.create('segment', [p1, p2],{withLabel: true,  name:"side 1",label:{offset:[-20,-15]}});
var l2 = board.create('segment', [p1,p3],{withLabel: true,  name:"side 2",label:{offset:[-40,5]}});
var l3 = board.create('segment', [p2,p3],{withLabel: true,  name:"side 3",label:{offset:[10,5]}});

The image appears in the following posts

  1. A triangle is a polygon with three sides. It is one of the basic shapes in plane geometry. Before we find out the types of triangles, let's look at how to construct a triangle.

    The elements of a triangle

    One of ways to construct a triangle is by 3 separate points. A triangle can be made by simply joining the 3 points. In the meantime, the basic elements of the triangle are also constructed.

    Vertices: the original 3 points which construct the triangle are the vertices of the triangle. They are endpoints of 3 sides. If a triangle is made by 3 given lines, the intersection points of separate two lines construct vertices of the triangle.

    Sides: line segments that join two consecutive vertices and form a closed two-dimensional shape. In a triangle, the sum of the length of two sides is larger than the third side.

    Interior angles: angles that are formed by two consecutive sides at the vertex where they converge. The sum of three interior angles of a triangle is 180°.

Triangle posted 1 year ago

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