Geometry/Trigonometry Determine angle in a Triangle
40919
Finding an angle within an 80-80-20 isosceles triangle
115929
In a triangle $\angle A = 2\angle B$ iff $a^2 = b(b+c)$
64034
How to determine if a point is in a 2D triangle?
132402
Find 2nd leg of right triangle with known leg and perimeter
70402
Geometry Triangle Question 3
43398
Find possible number of triangles with integer sides for a given inradius
19443
Drawing a triangle
123133
If, in a triangle, $\cos(A) + \cos(B) + 2\cos(C) = 2$ prove that the sides of the triangle are in AP
78991
How to calculate the rotation matrix between 2 3D triangles?
147467
Angle between 2 points
47342
Figure out if a fourth point resides within an angle created by three other points
111815
Determine angle $x$ using only elementary geometry
147334
We have angle=arctan(dy/dx), but what happens when dx=0?
135543
Proof of Angles going beyond 90 degrees in Trigonometry
155459
How to find out the solid angle subtended by a tetrahedron at its vertex?
68090
Can we find incentre of a triangle by using equation of lines?
153172
How to generate a list of values related to angles of a polygon?