Proving that a three complex numbers form an equilateral triangle with vertices on unit circle
131919
Vertices of equilateral triangle inscribed in the unit circle
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 $pa^2+qb^2 > pqc^2$
90056
A synthetic geometrical proof required on a result regarding Isosceles triangles.
69800
Construction of a right triangle
114411
Simple Proof of the Euler Identity $\exp{i\theta}=\cos{\theta}+i\sin{\theta}$
136721
Absolute value of a complex number proof
48339
A triangle with vertices on the sides of a square, with one at a midpoint, cannot be equilateral
24656
Proving that $\frac{\csc\theta}{\cot\theta}-\frac{\cot\theta}{\csc\theta}=\tan\theta\sin\theta$
11338
How to find the circumcenter of a triangle and the length of the corresponding radius of the circle in $\mathbb{R}^3$
40596
Proving a relation between inradius ,circumradius and exradii in a triangle
118501
Proving the length of a circle's arc is proportional to the size of the angle
79808
Prove the representation of complex numbers is parallelogram
46353
Proof that $\cos(\pi/3)=1/2$
55975
Let $a$, $b$ and $c$ be the three sides of a triangle. Show that $\frac{a}{b+c-a}+\frac{b}{c+a-b} + \frac{c}{a+b-c}\geqslant3$.
84686
Geometric Description Of a Set In The Complex Plane
111976
Prove that a product of two complex numbers has zero imaginary part
26501
Proof using complex numbers