56 lines
1.2 KiB
Markdown
56 lines
1.2 KiB
Markdown
---
|
||
id: 5900f4621000cf542c50ff75
|
||
challengeType: 5
|
||
title: 'Problem 246: Tangents to an ellipse'
|
||
videoUrl: ''
|
||
localeTitle: 问题246：切线到椭圆
|
||
---
|
||
|
||
## Description
|
||
<section id="description">椭圆的定义是：给定一个圆心c，其中心为M，半径为r，点G为d（G，M） <p>椭圆点的构造如下所示。 </p><p>给定的是M（-2000,1500）和G（8000,1500）。给定也是具有中心M和半径15000的圆c。与G和c等距的点的轨迹形成椭圆e。从外部的点P开始，绘制两个切线t1和t2到椭圆。让t1和t2接触椭圆的点为R和S. </p><p>对于多少格点P，角度RPS是否大于45度？ </p></section>
|
||
|
||
## Instructions
|
||
<section id="instructions">
|
||
</section>
|
||
|
||
## Tests
|
||
<section id='tests'>
|
||
|
||
```yml
|
||
tests:
|
||
- text: <code>euler246()</code>应该返回810834388。
|
||
testString: 'assert.strictEqual(euler246(), 810834388, "<code>euler246()</code> should return 810834388.");'
|
||
|
||
```
|
||
|
||
</section>
|
||
|
||
## Challenge Seed
|
||
<section id='challengeSeed'>
|
||
|
||
<div id='js-seed'>
|
||
|
||
```js
|
||
function euler246() {
|
||
// Good luck!
|
||
return true;
|
||
}
|
||
|
||
euler246();
|
||
|
||
```
|
||
|
||
</div>
|
||
|
||
|
||
|
||
</section>
|
||
|
||
## Solution
|
||
<section id='solution'>
|
||
|
||
```js
|
||
// solution required
|
||
```
|
||
</section>
|