Geometry Theorems and Problems  Recent Additions (Page
5 of 15)




Geometry Problem 841
Triangle, Medians, Centroid, Circumcenters, Perpendicular, Congruence, Similarity. 

van Lamoen Circle  Index. 

Geometry Problem 840
Parallelogram, Perpendicular, Diagonal, Metric Relations, Similarity. 

Geometry Problem 839
Problem 839: Parallelogram, Perpendicular, Diagonal, Metric Relations. 

Geometry Problem 838
Parallelogram, Perpendicular, Diagonal, Metric Relations. 

Geometry Problem 837
Triangle, Orthocenter, Circumcenter, Circle, Concyclic Points. 

Geometry Problem 836
Parallelogram, Perpendicular, Diagonal, Similarity, Metric Relations. 

Geometry Problem 835
Isosceles Triangle, Double Angle, Triple Angle, Auxiliary Lines. 

Prezi Presentation: A Geometry Course by Mark Vasicek


Geometry Problem 834
Parallelogram, Diagonal, Similarity, Geometric Mean, Mean Proportional. 

Mean in Geometry.
Index. 

Geometry Problem 833
Parallelogram, Diagonal, Similarity, Proportion. 

Geometry Problem 832
Quadrilateral, Isosceles triangle, 707040 degrees, Congruence, Auxiliary lines, Equilateral triangle. 

Geometry Problem 831
Quadrilateral, Diagonal, Midpoint, Opposite Angles, Congruence, Parallelogram. 

Geometry Problem 830
Quadrilateral, Triangle, Angles, 30 degrees, Congruence. 

Geometry Problem 829
Triangle, Circumcircle, Parallel, Chord, Side, Metric Relations. 

Geometry Problem 828
Quadrilateral, Midpoint, Opposite sides, Diagonals, Concurrent lines, Triangle, Bimedian. 

Geometry Problem 827: Brianchon Corollary
Circumscribed Hexagon, Tangency Points, Diagonal, Opposite Sides, Concurrent lines. 

Geometry Problem 826: Brianchon's Theorem
Circumscribed Hexagon, Concurrent Diagonals. 

Geometry Problem 825.
Circle, Semicircle, Arc, Chord, Midpoint, Sector, Triangle, Area. 

Geometry Problem 824
Desargues' Theorem, Triangles in Perspective. 

Geometry Problem 823.
Tangent Circles, Diameter, Perpendicular, Chord, Secant, Triangle, Area, Tangency Point. 

Circle Area.
Index.
Theorems and Problems.


Geometry Problem 822.
Circle, Semicircle, Arc, Chord, Midpoint, Sector, Triangle, Area. 

Geometry Problem 821.
Adams Circle. 

Geometry Problem 820.
Triangle, Cevian, Angles, 30 Degrees. 

Geometry Problems
811  820.
Triangle, Circle, Quadrilateral, Square, Pitot Theorem, Arbelos, Tangent, 30 Degrees. 

Geometry Problem 819.
Quadrilateral, Triangle, Angles, 30 degrees. 

Geometry Problem 818.
Square, Triangle, Angle. 

Geometry Problem 817. Two
circles, Tangent Lines, Circumscribed Quadrilaterals. 

Geometry Problem 816. Tangential or Circumscribed Quadrilateral: Pitot Theorem. 

Geometry Problem
815.
Triangle, Incircle, Semicircles, Arbelos, Area. 

Geometry Problem
814.
Two Equilateral Triangles with a common Vertex, Angle. 

Geometry Problem
813.
Right Triangle Area, Excircles, Cathetus, Tangency Points, Quadrilateral Area. 

Geometry Problem
812.
Four Tangent Circles, Common Tangent Line, Diameter, Area, Collinear Centers. 

Geometry Problem
811: Trisecting a line segment.
With four circles and one line. 

Geometry Problem
810: Trisecting a line segment.
With two circles and eight lines. 

Geometry Problem
809: Trisecting a line segment.
With three circles and four lines. 

Geometry Problem 808
Parallelogram, Perpendicular, Right Triangle, Semicircle Area, Diameter. 

Geometry Problem 807
Right Triangle Area, Incircle, Tangency Points, Semicircle Area. 

Lines. Theorems and Problems. 

Trisecting a Line Segment.
Theorems and Problems 

Geometry Problem 806
Triangle, Points on sides, Circumcenter, Similarity. 

Area of a Right Triangle, Theorems and Problems. 

iPad Apps: Apollonius Software. Problem 794: Right Triangle, Altitude, Three Incenters, Circumcircles, Incircle, Congruence.
Interactive Geometry Software. 

Geometry Problem 805, Stewart Theorem
Triangle, sides and a cevian.


iPad Apps: Apollonius, Interactive Geometry Software IGS Index.
Theorems and Problems with Apollonius for iPad. 

Geometry Problem
804
Circle, Chord, Midpoints. 

Geometry Problem
803
Right Triangle, Altitude, Angle Bisector, Perpendicular, Measurement. 

Geoboard
for iPad Pythagorean Theorem Proof by Leonardo. 

Polygon definition


Geoboard
for iPad Gallery: Squares inscribed in squares. Midpoints of the sides, Sequence, Recursive Form, Areas 

Geoboard
for iPad Gallery: Triangle with two squares (Problem 496). 

Geoboard
for iPad Gallery: Six squares with a common vertex. 

Triangle definition


Geoboard for iPad Index.
This virtual version is an openended educational tool, ideal for elementary classrooms and other learning environments that use iPod Touches, iPhones, or iPads 

Geoboard
for iPad Pythagorean Theorem Proof, Squares (Problem 540). 

Geometry Problem
802
Scalene Triangle, Median, Perpendicular, Angle, Measurement. 

Geometry Problem
801
Equilateral Triangles, Cevian, Midpoint, Distance, Measurement, Metric Relations. 

Geometry Problem
800: de Gua's Theorem
Pythagorean theorem in 3D, Tetrahedron, Cubic Vertex, Triangular Pyramid, Apex, Height, Right Triangle Area, Base Area, Projected Area. 

Geometry Problem 799
Parallelogram, Angle Bisector, Parallel, Triangle, Circumcircle, Circumcenter. 

Geometry Problem 798
Parallelogram, Secant Line, Tangent Circles, Circumcircles, Triangle. 

Geometry Problem 797
Parallelogram, Angle Bisector, Isosceles and Similar Triangles. 

Geometry Problem 796
Triangle, Altitude, Measurement of Angles. 

Geometry Problem 795
Intersecting Circles, Common Chord, Midpoint, Tangent, Secant Line, Perpendicular, 90 Degrees. 

Geometry Problem 794
Right Triangle, Altitude, Three Incenters, Circumcircles, Incircle, Congruence. 

Geometry Problem 793
Right Triangle, Altitude, Three Incircles, Incenters, Circumcircle, Circumradius, Perpendicular, Distance. 

Geometry Problem 792
Right Triangle, Altitude, Angle Bisector, Three Incircles, Five Concyclic Points, Circles. 

Geometry Problem 791
Regular Hexagon, Midpoints of Side and Diagonal, Equilateral Triangle, Area. 

Geometry Problem 790
Right Triangle, Altitude, Angle Bisector, Incircle, Tangency Point, Inradius, Circles, Tangent Line, Congruence. 

Geometry Problem 789
Right Triangle, Altitude, Angle Bisector, Incircle, Tangency Point, Inradius, Circles, Tangent Line. 
Go to Page: Previous 
1 
2 
3
 4 
5 
6 
7 
8 
9 
10 
11 
12 
13 
14 
15 
Next
