New posts in quadrilateral

Interesting tiling with a lot of symmetrical shapes

reference-request symmetry tiling quadrilateral tessellations

Volume of an Irregular Octahedron from edge lengths?

geometry volume polyhedra quadrilateral

Parallelogram and vectors

geometry vectors euclidean-geometry quadrilateral

Quadrilateral Finite Elements must be convex and not self-intersecting. But why?

geometry interpolation finite-element-method quadrilateral

Quadrilateral problem with midpoints of diagonals [duplicate]

quadrilateral geometric-transformation

Finding the area of the shaded square inside a square created by connecting point-opposite midpoint [closed]

geometry euclidean-geometry area rotations quadrilateral

Why study quadrilaterals?

geometry education quadrilateral

Angles of triangle $\triangle XYZ$ do not depend on the position of point $P$ (proof needed)

geometry euclidean-geometry triangles quadrilateral geometric-transformation

If a quadrilateral has a pair of equal opposite sides, and a pair of equal opposite angles, then is it necessarily a parallelogram?

geometry quadrilateral

What is the maximum area of a square inscribed in an equilateral triangle?

optimization triangles area maxima-minima quadrilateral

Japanese theorem for cyclic quadrilaterals Proof Inversion

geometry euclidean-geometry quadrilateral

Trisect a quadrilateral into a $9$-grid; the middle has $1/9$ the area

geometry euclidean-geometry area plane-geometry quadrilateral

Maximum area of a square in a triangle

geometry triangles area maxima-minima quadrilateral

Is there a formula to calculate the area of a trapezoid knowing the length of all its sides?

geometry euclidean-geometry area quadrilateral

Quadrilateral Interpolation

geometry interpolation finite-element-method quadrilateral

A conjecture involving prime numbers and parallelograms

number-theory prime-numbers euclidean-geometry quadrilateral

Is every parallelogram a rectangle ??

geometry triangles area fake-proofs quadrilateral

Any employment for the Varignon parallelogram?

geometry interpolation applications finite-element-method quadrilateral

Area of parallelogram = Area of square. Shear transform

geometry area quadrilateral

Area of a square inside a square created by connecting point-opposite midpoint

geometry euclidean-geometry area rotations quadrilateral