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

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

What is wrong in my proof that 90 = 95? Or is it correct?

Finding all possible proofs

Sangaku - Find diameter of congruent circles in a $9$-$12$-$15$ right triangle

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

New very simple golden ratio construction incorporating a triangle, square, and pentagon all with sides of equal length. Is there any prior art?

Difference between Euclidean space and vector space?

In-center of a triangle

A set of points is contained in a sphere $S$. When is $S$ also the circumsphere?

Find the area of the triangular region ABC

Two tetrahedra are congruent given a certain condition

Sangaku: Show line segment is perpendicular to diameter of container circle

What's the best way to catch wild Pokémon in Pokémon GO?

How do I compute the area of a cross which contains several disks which may overlap?

Finding tangents to a circle with a straightedge

5 Points uniformly placed on a sphere

What regular polygons can be constructed on the points of a regular orthogonal grid?