What is the maximum possible area of a triangle with perimeter 6? Which triangle has this area?
91053
Simple proof that equilateral triangles have maximum area
366
Can every triangle be divided into five isosceles triangles?
112135
Area formula for cyclic pentagon?
67774
Number of isosceles triangle.
96686
Determine the area of a regular octagon with vertices on the unit circle
62126
Constructing a triangle given 2 sides and the inscribed circle's radius
147351
The expected area of a triangle formed by three points randomly chosen from the unit square
97473
Prove that: area of triangle $S_{ABC}=p \cdot R$, where p is half perimeter of triangle $DEF$
98435
Probability that a triangle can be formed from a permutation of three edges of random length
19443
Drawing a triangle
123102
How do I find the maximum perimeter of a rectangle inscribed in an ellipse?
154274
How many triangles are there in the picture?
111292
Find all triangles of which perimeter and area are numerically equal
152509
Does there exist a side-rational triangle of area $1$?
104701
Find the functions for which the area of the triangle made by tangent at a point is independent of the point
37744
Prove that given $a,b,c > 0$, it is possible to construct a triangle with sides of length $a,b,c$ if and only if $pa^2+qb^2 > pqc^2$
148567
Given $a,b$, what is the maximum number which can not be formed using $na + mb$?