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---
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id: geo-pri
title: "Geometry Primitives"
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author: Benjamin Qi
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description: Basic setup for geometry problems.
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---
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## Primitives
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You should know basic operations like cross product and dot product. For platinum specifically, you should be fine as long as you know how to code **convex hull**.
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### Tutorial
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<resources>
<resource source="CPC" title="12 - geometry" url="12_geometry">basics, polygon area, point in polygon</resource>
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<resource source="CPH" title="29"></resource>
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<resource source="TC" title="Basic Geometry Concepts" url="geometry-concepts-basic-concepts"></resource>
<resource source="CF" title="Point Class" url="blog/entry/48122"></resource>
<resource source="CF" title="C++ - std::complex" url="blog/entry/22175"></resource>
<resource source="cp-algo" title="Geometry - Elementary Operations" url="https://cp-algorithms.com/"></resource>
<resource source="CF" title="vlecomte - Geometry Handbook" url="blog/entry/59129"></resource>
</resources>
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### Problems
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- [My Templates](https://github.com/bqi343/USACO/tree/master/Implementations/content/geometry%20(13)/Primitives)
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- Template Testing
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- [yosupo: Sort Points by Arg](https://judge.yosupo.jp/problem/sort_points_by_argument)
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- [Kattis Point in Polygon](https://open.kattis.com/problems/pointinpolygon)
- [Kattis Polygon Area](https://open.kattis.com/problems/polygonarea)
- [Kattis Max Collinear](https://open.kattis.com/problems/maxcolinear)
- Misc
- [Arpa & Geo](http://codeforces.com/problemset/problem/851/B)
- [Tell Your World](http://codeforces.com/problemset/problem/849/B)
- [Gleb & Pizza](http://codeforces.com/problemset/problem/842/B)
- [Birthday Cake](https://open.kattis.com/problems/birthdaycake)
- [Racing Off Track](https://open.kattis.com/contests/acpc17open/problems/racingofftrack)
- [TopCoder Watchtower](https://community.topcoder.com/stat?c=problem_statement&pm=2014&rd=4685)
