56 lines
1.2 KiB
Markdown
56 lines
1.2 KiB
Markdown
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---
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id: 5900f4621000cf542c50ff75
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challengeType: 5
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title: 'Problem 246: Tangents to an ellipse'
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videoUrl: ''
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localeTitle: 问题246：切线到椭圆
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---
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## Description
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<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>
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## Instructions
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<section id="instructions">
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</section>
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## Tests
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<section id='tests'>
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```yml
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tests:
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- text: <code>euler246()</code>应该返回810834388。
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testString: 'assert.strictEqual(euler246(), 810834388, "<code>euler246()</code> should return 810834388.");'
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```
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</section>
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## Challenge Seed
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<section id='challengeSeed'>
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<div id='js-seed'>
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```js
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function euler246() {
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// Good luck!
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return true;
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}
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euler246();
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```
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</div>
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</section>
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## Solution
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<section id='solution'>
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```js
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// solution required
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```
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</section>
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