Unknown angle in an isosceles triangle with inscribed triangles having angles 20°,30°,50°,60°
32970
How to find measurements of angle CBD?
78448
Find the acute angle $x$ for $\tan x = \tan(x+10^\circ)\tan(x+20^\circ)\tan(x+30^\circ)$.
114011
Algebra - Solving for three unknowns.
90056
A synthetic geometrical proof required on a result regarding Isosceles triangles.
18005
Angle notation for complex numbers in polar form
101476
If $A$, $B$ and $C$ are the angles of a triangle then find the value of $\Delta$
129002
Number of triangles formed by $m$ lines
106485
Olympiad Geometry Problem
10772
Equilateral triangle inscribed in a ellipse
158558
what does ∇ (upside down triangle) symbol mean in this problem
61343
Prove that if $\alpha, \beta, \gamma$ are angles in triangle, then $(tan(\frac{\alpha}{2}))^2+(tan(\frac{\beta}{2}))^2+(tan(\frac{\gamma}{2}))^2\geq1$
133567
Area of a triangle in terms of areas of certain subtriangles
158007
To inscribe a circle in a given triangle
43183
basic geometry angle problem
62126
Constructing a triangle given 2 sides and the inscribed circle's radius
47342
Figure out if a fourth point resides within an angle created by three other points
84813
Rectangle inscribed in a right triangle with largest perimeter