New posts in plane-geometry

Formal definition of "planar graph"

graph-theory soft-question definition plane-geometry

Find the area of ​the $AFRC$ quadrilateral below.

geometry euclidean-geometry plane-geometry

Find the area of ​the triangular region ABC below

geometry euclidean-geometry plane-geometry

Find the area of MBNO region below?

geometry euclidean-geometry plane-geometry

Find the area of ​the shaded region in the triangle below?

geometry euclidean-geometry plane-geometry

Covering a polygon with an odd number of sides

combinatorics geometry plane-geometry combinatorial-geometry

Calculate the measure of the missing angle without trigonometry

geometry euclidean-geometry plane-geometry angle

Find the area of ​the shaded region. in the triangle $HGE$ below

geometry euclidean-geometry plane-geometry

Uniqueness of a configuration of $7$ points in $\Bbb R^2$ such that, given any $3$, $2$ of them are $1$ unit apart

combinatorics geometry euclidean-geometry plane-geometry combinatorial-geometry

:Find the area of ​the shaded region $ABC$ in the figure below

geometry euclidean-geometry plane-geometry

Find the angles of given triangle ABC

geometry euclidean-geometry triangles plane-geometry angle

Find the area of ​the triangular region KHQ,

geometry euclidean-geometry triangles alternative-proof plane-geometry

If $J$ is tangent point of $GH$ with incircle of $FGH$ and $D$ is intersection of $F$-mixtilinear inclrcle with $(FGH)$, then $\angle FGH=\angle GDJ$.

geometry euclidean-geometry triangles circles plane-geometry

How to find the centre of the circle that inscibes an isosceles trapezoid?

geometry euclidean-geometry plane-geometry

Hole in the axioms of Hartshorne's "Foundations of Projective Geometry"?

affine-geometry plane-geometry

Find the area of ​the triangular region ABC

geometry euclidean-geometry plane-geometry

Given three non-overlapping circles, can we construct (via straightedge and compass) the triangle of minimum perimeter with one vertex on each circle?

geometry recreational-mathematics plane-geometry geometric-construction

Finding tangents to a circle with a straightedge

geometry euclidean-geometry geometric-construction plane-geometry

Find the area of ​region ABC.

geometry euclidean-geometry plane-geometry

A chain of six circles associated with a cyclic hexagon

geometry euclidean-geometry circles plane-geometry