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# Geometry and trigonometry (maybe?)

Can anybody recommend any sources to learn geometry? About level 3-4, I'm struggling in that on Brilliant as well as maths competitioms, when I often reach a dead end. Thanks for help.

Note by Victor Loh
3 years, 12 months ago

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Geometry is not my department but you can have a look at Coxeter, Geometry revisited.

- 3 years, 10 months ago

Sal's videos on Geometry and Trigonometry. A great site for learning all sorts of things! Not just geometry and trig. :-=P

- 3 years, 12 months ago

Hi, Vishnuram! You almost answer all of my problems that I made. Would you be so kind as to make the solutions of these problems that you've answered recently: Rolling Ball and Insane Integral? I would be really grateful for your kindness. :)

- 3 years, 12 months ago

Actually, most geometry questions make use of congruency and similarity so that is the place you should start with if you want to improve in geometry. Try different methods if you reach a dead end. :)

- 3 years, 12 months ago

And don't forget another important method:transformation

- 3 years, 12 months ago

Thanks

- 3 years, 10 months ago

Challenges and thrills is a gud book for geometry according to me.

- 3 years, 12 months ago