New posts in Triangles

Distances from Morley triangle to edges of the original triangle

For acute $\triangle ABC$, prove $(\cos A+\cos B)^2+(\cos A+\cos C)^2+(\cos B+\cos C)^2\leq3$

Prove that $m_a\geq \dfrac{b^2+c^2}{4R}$

An angle inside a regular pentagon

Find angle in triangle $ABC$ with cevian line $AD$, such that $AB=CD$.

Find how many parts are in a triangle

What's the size of an angle in a triangle with sides $\sin(x), \cos(x),$ and $\tan(x)$?

triangle inside triangle// with ratio 2:1

Covering the maximum area of a semi-circle with right-angle triangles

How many right triangles can be built from points