6
160
Search
Circumcenters pass through common point
#Geometry #Circumcircle #GeometricTransformation #Reflection #Incenter #Rhombus #Trapezoid
2
8
156
1
4
94
AC\| DX DY\| AB reflection of H
#Geometry #GeometricTransformation #Reflection #Circumcircle #Iran #Iranmo #TangentCircles
1
6
169
Line passing through a fixed point
#Geometry #Parallelogram #GeometricTransformation #Homothety #Rectangle #GeometryProposed
1
4
119
Line through orthocenter
#Geometry #Circumcircle #GeometricTransformation #Reflection #PowerOfAPoint #PerpendicularBisector #ComplexBash
4
96
Two triangles having the same orthocenter
#Geometry #Circumcircle #GeometricTransformation #Reflection #Incenter #PowerOfAPoint #RadicalAxis
1
111
All-Russian Olympiad 2010 grade 9 P-3
#Geometry #Circumcircle #GeometricTransformation #Reflection #Symmetry #Quadratics #PerpendicularBisector
1
2
7
144
Isogonal conjugation with respect to a triangle
#Geometry #GeometricTransformation #Reflection #Trigonometry #Ratio #Incenter #Circumcircle
1
2
140
Small translation with bounded overlap
#Combinatorics #Geometry #GeometricTransformation #Probability #Topology
2
138
Midpoints of altitudes and concurrent cevians
#ProjectiveGeometry #Geometry #GeometricTransformation #Reflection #Latex #GeometryProposed
1
5
348
draw diagonals in a regular (2n+1)-gon
#Geometry #GeometricTransformation #Reflection #CombinatoricsUnsolved #Combinatorics
104
Prove quadrilateral is kite
#Geometry #GeometricTransformation #Reflection #Circumcircle #Trigonometry #PerpendicularBisector #GeometryUnsolved
1
3
230
Equality of angles [Iran TST 2010]
#Geometry #Circumcircle #GeometricTransformation #Ratio #Homothety #RadicalAxis
2
228
Rhombus and insimilicenters
#Geometry #Rhombus #GeometricTransformation #IMOShortlist #IMOShortlist2020 #Hi
6
123
3
158
A well-known circle hides in the dark
#Geometry #Circumcircle #GeometricTransformation #Homothety #Ratio #PowerOfAPoint #RadicalAxis
1
123
1
4
175
f(x^3 + y^3 + z^3) = f(x)^3 + f(y)^3 + f(z)^3
#Function #Geometry #GeometricTransformation #3DGeometry #Induction #Calculus #Integration
1
6
393
incircle excenter midpoints
#Geometry #GeometricTransformation #Reflection #Homothety #PerpendicularBisector #GeometryProposed
8
458