---
title: "Triangle Circumcenter"
description: "Calculate and visualize the circumcenter and circumcircle of a triangle geometry object."
phaser: "4.1.0"
size: "800x600"
files: 1
url: https://phaser.io/oss/examples/v4.1.0/geom/triangle/view/circumcenter
site: Phaser - https://phaser.io
---

> This page is about the open-source Phaser framework, for writing a game's code by hand. To make a game with AI, use Phaser AE (https://phaser.io/): the desk's tools work with Web MCP, and the CLI works with your own coding agent. See "For AI agents: Phaser AE" at the end of this page.

# Triangle Circumcenter

Calculate and visualize the circumcenter and circumcircle of a triangle geometry object.

A Phaser 4.1.0 example in [Geom / Triangle](https://phaser.io/oss/examples/v4.1.0/geom/triangle.md). It runs at 800 × 600, and loads its assets from https://cdn.phaserfiles.com/v410. See it running, with its code, at https://phaser.io/oss/examples/v4.1.0/geom/triangle/view/circumcenter.

To run it, load Phaser 4.1.0 (`https://cdn.jsdelivr.net/npm/phaser@4.1.0/dist/phaser.min.js`), then the file, on a page with a `<div id="game-container">`.

## Code

### circumcenter.js

```js
class Example extends Phaser.Scene
{
    create ()
    {
        const graphics = this.add.graphics({ lineStyle: { width: 2, color: 0x00ff00 }, fillStyle: { color: 0xff00ff } });

        //  Create a little random triangle

        const x1 = Phaser.Math.Between(300, 350);
        const y1 = Phaser.Math.Between(300, 350);

        const x2 = Phaser.Math.Between(400, 450);
        const y2 = Phaser.Math.Between(200, 300);

        const x3 = Phaser.Math.Between(500, 550);
        const y3 = Phaser.Math.Between(300, 350);

        const triangle = new Phaser.Geom.Triangle(x1, y1, x2, y2, x3, y3);

        graphics.fillTriangleShape(triangle);

        //  Get the circumcircle of the triangle

        const circumcircle = Phaser.Geom.Triangle.CircumCircle(triangle);

        //  Draw the circumcircle

        graphics.strokeCircleShape(circumcircle);

        //  Get the circumcenter of the triangle

        const circumcenter = Phaser.Geom.Triangle.CircumCenter(triangle);

        //  Draw the circumcenter

        graphics.fillStyle(0xffff00);
        graphics.fillPointShape(circumcenter, 4);
    }
}

const config = {
    scale: { mode: Phaser.Scale.FIT },
    width: 800,
    height: 600,
    type: Phaser.AUTO,
    parent: 'game-container',
    scene: Example
};

const game = new Phaser.Game(config);
```

## More in Triangle

- [Build Equilateral Triangle](https://phaser.io/oss/examples/v4.1.0/geom/triangle/view/build-equilateral.md): Demonstrates how to create a geometrically perfect equilateral triangle by specifying a starting point and the length of its sides.
- [Clone a Triangle](https://phaser.io/oss/examples/v4.1.0/geom/triangle/view/clone.md): Demonstrates how to use the Clone method to create duplicates of a Triangle geometry object.
- [Create Triangle](https://phaser.io/oss/examples/v4.1.0/geom/triangle/view/create-triangle.md): Learn how to define a geometric triangle and render it as a filled shape using the Graphics object.
- [Right-Angled Triangle](https://phaser.io/oss/examples/v4.1.0/geom/triangle/view/build-right.md): Demonstrates how to create a right-angled triangle geometry object by specifying its position, width, and height.
- [Rotate Triangle Around a Point](https://phaser.io/oss/examples/v4.1.0/geom/triangle/view/rotate-around-xy.md): Demonstrates how to rotate a triangle geometry object around a specific X and Y coordinate.
- [Rotate Triangle Around Center](https://phaser.io/oss/examples/v4.1.0/geom/triangle/view/rotate-from-center.md): Demonstrates how to rotate a Triangle geometry object around its own center point and render the results using Graphics.
- [Rotate Triangle Around Point](https://phaser.io/oss/examples/v4.1.0/geom/triangle/view/rotate-around-point.md): Demonstrates how to rotate a triangle shape around various geometric anchor points, including the centroid, circumcenter, incenter, and specific vertices.
- [Triangle Area](https://phaser.io/oss/examples/v4.1.0/geom/triangle/view/area.md): Calculate and display the area of a Triangle geometry object as its vertices are modified by the mouse pointer.
- [Triangle Bottom](https://phaser.io/oss/examples/v4.1.0/geom/triangle/view/bottom.md): Demonstrates using the bottom property to get or set the vertical position of the lowest point of a Triangle geometry object.
- [Triangle Center On](https://phaser.io/oss/examples/v4.1.0/geom/triangle/view/center-on.md): Demonstrates using the CenterOn function to position a geometric triangle by its center point as it follows the mouse pointer.
- [Triangle Centroid](https://phaser.io/oss/examples/v4.1.0/geom/triangle/view/centroid.md): Calculate and visualize the geometric center (centroid) of a triangle by drawing lines from each vertex to the center point.
- [Triangle Circumcircle](https://phaser.io/oss/examples/v4.1.0/geom/triangle/view/circumcircle.md): Calculate and render a circle that passes through all three vertices of a Phaser Triangle geometry object.
- [All 32 examples in Triangle](https://phaser.io/oss/examples/v4.1.0/geom/triangle.md)

---

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