Stroked Triangle

class Example extends Phaser.Scene
{
    create ()
    {
        const graphics = this.add.graphics();

        graphics.lineStyle(1, 0xffffff, 1);
        graphics.strokeTriangle(200, 200, 400, 50, 500, 300);

        graphics.lineStyle(4, 0x00ffff, 1);
        graphics.strokeTriangle(60, 500, 60, 400, 500, 500);
    }
}

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

const game = new Phaser.Game(config);