---
id: 5900f44e1000cf542c50ff5f
challengeType: 5
title: 'Problem 224: Almost right-angled triangles II'
---

## Description
<section id='description'>
Let us call an integer sided triangle with sides a ≤ b ≤ c barely obtuse if the sides satisfy a2 + b2 = c2 - 1.

How many barely obtuse triangles are there with perimeter ≤ 75,000,000?
</section>

## Instructions
<section id='instructions'>

</section>

## Tests
<section id='tests'>

```yml
tests:
  - text: <code>euler224()</code> should return 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>