

Online Geometry Theorems and Problems. College, High School


Geometry  Recent
Additions




Geometry Problem 1355.
Triangle, Midpoint, Median, Circle, Chord, Equal Product of measure of segments. 

Geometry Problem 1354. Circle, Tangent Lines, Secant, Chord, Center, Parallel Lines. 

Geometry Problem 1353. Tangent Circles, Perpendicular Diameters, Congruence, 30 Degrees. 

Geometry Problem 1352. Rectangles, Sum of Squared Distances. 

Geometry Problem 1351. Two Tangential or Circumscribed Quadrilaterals, Midpoints, Perpendiculars. 

Geometry Problem 1350. Triangle with three Intersecting Circles, Incircle, Collinear Points. 

Geometry Problem 1349. Three Squares, 90 Degrees, Perpendicular Lines, Diagonal. Math Infographic. 

Geometry Problem 1348. Three Concentric Circles, Equilateral Triangle, Perpendicular Bisector, Congruence. 

Geometry Problem 1347. Triangle, Angle Bisector, Congruence, Circumcircle, Tangent, Equilateral Triangle. 

Geometry Problem 1346. Equilateral Triangle, Point on the Incircle, Altitude, Perpendicular, Sum of Squares, Distance. 

Geometry Problem 1345: Three Equilateral Triangles, Center, Area, Common Vertex. 

Geometry Problem 1344, Bottema's Theorem: Triangle and Squares with Interactive
Geometry Software. 

Problem 1343.
Triangle, Excircles, Circle, Tangent, Tangency Points, Chord, Perpendicular, 90 Degrees, Collinearity. Machu Picchu in the background.


Problem 1342.
Circle, Secant, Chord, Midpoint, Concyclic Points, Cyclic Quadrilateral.


Problem 1341.
Isosceles Triangle, 802080 Degrees, Circumcenter, Angle Bisector.


Problem 1340.
Triangle, Incenter, Concentric Circles, Isosceles Triangles, Congruence.


Problem 1339.
Circle, Diameter, Tangent, Secant, Parallelogram.


Problem 1338.
Four Squares, Diagonals, Angle, 45 Degrees, Areas.


Problem 1337.
Parallelogram, Diagonals, Circle, Circumcircle, Tangent Line, Triangle, Congruence.


Problem 1336.
Right Triangle, Cevian, Double Angle, Perpendicular, 90 Degrees.


Problem 1335. The
Lune of Hippocrates has the same area of a Kite.


Problem 1334. Square, Kite, Sum of Segments.


Kite definition and basic theorems


Geometry Problem 1333.
Two Squares Side by Side, Three Triangles, Area, Measurement. 

Geometry Problem 1332.
Two Squares Side by Side, Triangle, Area. 

Geometry Problem 1331.
Two Squares Side by Side, Parallel, Perpendicular, 90 Degrees, Measurement. 

Geometry Problem 1330.
Two Squares Side by Side, Parallel, 45, 90 Degrees. 

Geometry Problem 1329.
Two Squares Side by Side, Parallel, Perpendicular, 90 Degrees, Congruence. 

Geometry Problem 1328.
Two Squares Side by Side, Perpendicular, 90 Degrees, Congruence. 

Geometry Problem 1327.
Two Squares Side by Side, Perpendicular, 90 Degrees, Angle. 

Geometry Problem 1326.
Triangle, Cevian, Incenters, Sum of Angles, 270 Degrees. 

Geometry Problem 1325.
Octagons, Midpoints, Squares, Mobile Apps, iPad. 

Geometry Problem 1324.
Quadrilateral, Diagonal, 45 Degrees, Angle Bisector, Isosceles Triangle, Congruence. 

Geometry Problem 1323.
Square, Angle Trisector, Diagonal, Regular Dodecagon, Area, 3060 degrees. 

Geometry Problem 1322.
Triangle, Angle Bisector, Circumcircle, Chord, Secant, Sum of two Angles. 

Geometry Problem 1321.
Intersecting Circles, Diameter, Secant, Chord, Collinearity. 

Geometry Problem 1320.
Triangle, Incircle, Tangent, Chord, Circle, Parallel, Perpendicular, Collinearity. 
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