Valid Boomerang
<p>Given an array <code>points</code> where <code>points[i] = [x<sub>i</sub>, y<sub>i</sub>]</code> represents a point on the <strong>X-Y</strong> plane, return <code>true</code> <em>if these points are a <strong>boomerang</strong></em>.</p>

<p>A <strong>boomerang</strong> is a set of three points that are <strong>all distinct</strong> and <strong>not in a straight line</strong>.</p>

<p>&nbsp;</p>
<p><strong class="example">Example 1:</strong></p>
<pre><strong>Input:</strong> points = [[1,1],[2,3],[3,2]]
<strong>Output:</strong> true
</pre><p><strong class="example">Example 2:</strong></p>
<pre><strong>Input:</strong> points = [[1,1],[2,2],[3,3]]
<strong>Output:</strong> false
</pre>
<p>&nbsp;</p>
<p><strong>Constraints:</strong></p>

<ul>
	<li><code>points.length == 3</code></li>
	<li><code>points[i].length == 2</code></li>
	<li><code>0 &lt;= x<sub>i</sub>, y<sub>i</sub> &lt;= 100</code></li>
</ul>
Geometry; Array; Math
function isBoomerang(points: number[][]): boolean {
    const [x1, y1] = points[0];
    const [x2, y2] = points[1];
    const [x3, y3] = points[2];
    return (x1 - x2) * (y2 - y3) !== (x2 - x3) * (y1 - y2);
}
