---
id: 5900f44e1000cf542c50ff5f
challengeType: 5
title: 'Problem 224: Almost right-angled triangles II'
---
## 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?
## Instructions
## Tests
```yml
tests:
- text: euler224() should return 4137330.
testString: 'assert.strictEqual(euler224(), 4137330, "euler224() should return 4137330.");'
```
## Challenge Seed
```js
function euler224() {
// Good luck!
return true;
}
euler224();
```