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freeCodeCamp/curriculum/challenges/english/10-coding-interview-prep/project-euler/problem-223-almost-right-angled-triangles-i.english.md
Oliver Eyton-Williams bd68b70f3d Feat: hide blocks not challenges (#39504)
* fix: remove isHidden flag from frontmatter

* fix: add isUpcomingChange

Co-authored-by: Ahmad Abdolsaheb <ahmad.abdolsaheb@gmail.com>

* feat: hide blocks not challenges

Co-authored-by: Ahmad Abdolsaheb <ahmad.abdolsaheb@gmail.com>

Co-authored-by: Ahmad Abdolsaheb <ahmad.abdolsaheb@gmail.com>
2020-09-03 15:07:40 -07:00

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---
id: 5900f44b1000cf542c50ff5e
challengeType: 5
title: 'Problem 223: Almost right-angled triangles I'
forumTopicId: 301866
---
## Description
<section id='description'>
Let us call an integer sided triangle with sides a ≤ b ≤ c barely acute if the sides satisfy a2 + b2 = c2 + 1.
How many barely acute triangles are there with perimeter ≤ 25,000,000?
</section>
## Instructions
<section id='instructions'>
</section>
## Tests
<section id='tests'>
```yml
tests:
- text: <code>euler223()</code> should return 61614848.
testString: assert.strictEqual(euler223(), 61614848);
```
</section>
## Challenge Seed
<section id='challengeSeed'>
<div id='js-seed'>
```js
function euler223() {
// Good luck!
return true;
}
euler223();
```
</div>
</section>
## Solution
<section id='solution'>
```js
// solution required
```
</section>