---
id: 5900f44e1000cf542c50ff5f
challengeType: 5
title: 'Problem 224: Almost right-angled triangles II'
videoUrl: ''
localeTitle: 问题224：几乎直角三角形II
---

## Description
<section id="description">如果边满足a2 + b2 = c2  -  1，让我们称一个边长为a≤b≤c的整数边三角形，几乎不会钝。 <p>有多少个几乎没有钝角的三角形，周长≤75,000,000？ </p></section>

## Instructions
<section id="instructions">
</section>

## Tests
<section id='tests'>

```yml
tests:
  - text: <code>euler224()</code>应返回4137330。
    testString: 'assert.strictEqual(euler224(), 4137330, "<code>euler224()</code> should return 4137330.");'

```

</section>

## Challenge Seed
<section id='challengeSeed'>

<div id='js-seed'>

```js
function euler224() {
  // Good luck!
  return true;
}

euler224();

```

</div>



</section>

## Solution
<section id='solution'>

```js
// solution required
```
</section>
