Ratio of two triangles.
106141
Find the area ratio between ABC and the hatched triangle.
106816
Medians of a triangle and similar triangle properties
106485
Olympiad Geometry Problem
83034
Triangle inequality square #2
72882
If $a$, $b$, and $c$ are sides of a triangle, then $\frac{a}{b+c}+\frac{b}{c+a}+\frac{c}{a+b}<2$.
157274
What is the distribution of the ratio of two normals?
19443
Drawing a triangle
130751
Lower bound for monochromatic triangles in $K_n$
133567
Area of a triangle in terms of areas of certain subtriangles
129002
Number of triangles formed by $m$ lines
63314
Triangular Factorials
123465
In triangle $ABC$, $AA_1$, $BB_1$, $CC_1$ divide sides in ratio of $1: 2$ and meet at $M$, $K$, $L$. Find area relation of $KLM$ and $ABC$
130470
Find the angle ADE of the given triangle.
117349
counting triangles in a graph or its complement
43398
Find possible number of triangles with integer sides for a given inradius
42852
The legs of a right triangle with given hypotenuse and radius of inscribed circle
11150
Standard error of a ratio