freeCodeCamp/curriculum/challenges/chinese/10-coding-interview-prep/project-euler/problem-373-circumscribed-c...

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---
id: 5900f4e11000cf542c50fff4
title: 问题373外接圆圈
challengeType: 5
videoUrl: ''
---
# --description--
每个三角形都有一个穿过三个顶点的外接圆。考虑所有整数边三角形,其外接圆的半径也是整数。
设Sn是半径不超过n的所有这些三角形的外接圆的半径之和。
S100= 4950并且S1200= 1653605。
找到S107
# --hints--
`euler373()`应该返回727227472448913。
```js
assert.strictEqual(euler373(), 727227472448913);
```
# --solutions--