Looking for two sides in a right triangle where the perimeter is known
132402
Find 2nd leg of right triangle with known leg and perimeter
30044
Inequality with triangle sides
57053
Is being a right triangle both necessary and sufficient for the Pythagorean Theorem to hold?
35698
Given vectors $u,v, i$, find vector $w$ such that $i$ is incenter of triangle $[u,v,w]$
53499
Equilateral triangle inscribed in a triangle
95136
Finding center and radius of circumscribed triangle
158007
To inscribe a circle in a given triangle
153103
How to tell whether a point is to the right or left side of a line
123102
How do I find the maximum perimeter of a rectangle inscribed in an ellipse?
100939
Circle with two borders
116153
The Notorious Triangle Problem
35629
Trisect a quadrilateral into a $9$-grid; the middle has $1/9$ the area
134652
Prove that the perpendicular bisectors of the sides of a triangle meet at a point
139085
maximize volume of triangle in given perimeter
60202
Find a plane that passes through a point and is perpendicular to 2 planes
83788
Condition on sides of triangle to proof it is isoceles
68090
Can we find incentre of a triangle by using equation of lines?