ee1e8abd87
* feat(tools): add seed/solution restore script * chore(curriculum): remove empty sections' markers * chore(curriculum): add seed + solution to Chinese * chore: remove old formatter * fix: update getChallenges parse translated challenges separately, without reference to the source * chore(curriculum): add dashedName to English * chore(curriculum): add dashedName to Chinese * refactor: remove unused challenge property 'name' * fix: relax dashedName requirement * fix: stray tag Remove stray `pre` tag from challenge file. Signed-off-by: nhcarrigan <nhcarrigan@gmail.com> Co-authored-by: nhcarrigan <nhcarrigan@gmail.com>
45 lines
847 B
Markdown
45 lines
847 B
Markdown
---
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id: 5900f4621000cf542c50ff75
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title: 问题246：切线到椭圆
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challengeType: 5
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videoUrl: ''
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dashedName: problem-246-tangents-to-an-ellipse
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---
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# --description--
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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）
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椭圆点的构造如下所示。
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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.
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对于多少格点P，角度RPS是否大于45度？
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# --hints--
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`euler246()`应该返回810834388。
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```js
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assert.strictEqual(euler246(), 810834388);
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```
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# --seed--
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## --seed-contents--
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```js
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function euler246() {
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return true;
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}
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euler246();
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```
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# --solutions--
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```js
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// solution required
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```
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