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List Question

Triangle with a median

Find a point related to triangle.

Complete tesselation of sphere with hexagons

Proving that the orthocentre of an acute triangle is its orthic triangle's incentre.

Using Menelaus to show: The perpendicular bisectors of the angles bisectors of a triangle meet opposite sides in collinear points

If $AB = 9$ and $AC:BC=40:41$, then find maximum area of $\triangle ABC$. (via Brilliant)

How to prove the sum of angles is $\pi$ radians

Ladder slides down a wall

Most valuable rectangle contained in an equilateral triangle

Proving if triangle with sides $a^n,b^n,c^n$ exists for all $n\in N$ then $a=b$ or $a=b=c$

Proving that if two line segments are equal iff another pair of angles are equal.

Triangle and Quadrilateral Areas.

Areas of two triangles.

Congruent Triangles.

Area of middle piece in triangle

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