New posts in geometry

Sliver triangle

geometry triangles

What is the interior of the standard-$n$-simplex?

general-topology geometry elementary-set-theory

The shape of Pringles potato chip [closed]

geometry hyperbolic-geometry

Can one always map a given triangle into a triangle with chosen angles by means of a parallel projection?

Are there two different ways to generalize the orthogonal group?

linear-algebra geometry lie-groups normed-spaces orthogonality

For what $n$ does a hyperbolic regular $n$-gon exist around a circle?

geometry hyperbolic-geometry

Must a curve of constant width be generated with an odd number of sides?

Geometric justification of the trigonometric identity $\arctan x + \arctan \frac{1-x}{1+x} = \frac \pi 4$

geometry trigonometry

Number of triangles $\Delta ABC$ with $\angle{ACB} = 30^o$ and $AC=9\sqrt{3}$ and $AB=9$?

geometry algebra-precalculus trigonometry triangles plane-geometry

A question of H.G. Wells' mathematics

geometry soft-question rigid-transformation transformational-geometry

Non-geometric Proof of Pythagorean Theorem [closed]

Why can geometric figures, such as a straight line move?

geometry analytic-geometry philosophy

Calculating closest and furthest possible diagonal intersections.

geometry graphing-functions

Calculating the height of a circular segment at all points provided only chord and arc lengths

For an ellipse with minor radius $b$, show that the product of distances from the foci to any tangent line is $b^2$

Problems with seemingly not enough information

geometry big-list

Number of triangles formed by $m$ lines

combinatorics geometry

Why are triangles, squares and hexagons the only polygons with which it is possible to tile a plane?

geometry tessellations

Are proofs in geometry rigorous?

Solid angle between vectors in n-dimensional space

linear-algebra geometry vector-spaces euclidean-geometry