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Geometry Problem 1307. Triangle, Incenter, Parallel line, Sides, Measurement.


Geometry Problem 1306. Cyclic, Inscribed Quadrilateral, Circle, Tangent, Diagonals, Collinear Points.


JavaScript Index. Mind Maps.


Geometry Problem 1305. Triangle, Circumcircle, Angle Bisector, Arc, Perpendicular, Area.


Geometry Problem 1304. Triangle, 120 Degrees, Angle Bisector, Measurement.


Geometry Problem 1303. Triangle, 60 Degrees, Angle Bisector, Measurement.


Geometry Problem 1302. Triangle, Median, Midpoint, Circles, Diameters, Congruence.


Geometry Problem 1301. Arbelos, Semicircles, Diameters, Circle, Incircle, Incenter, Square, Midpoint, Concurrency.


Geometry Problem 1300. Arbelos, Semicircles, Diameters, Circle, Incircle, Tangent, Perpendicular, Concurrent Lines.


Geometry Problem 1299. Triangles, Interior Point, Angles, 30 degrees.


Geometry Problem 1298. Arbelos, Semicircles, Diameters, Circle, Incircle, Tangent, Angle Bisector, Perpendicular, Midpoint.


Geometry Problem 718. Intersecting Circles, Midpoint, Angle, Measurement.


Circle Word Cloud, Mobile Apps.


Geometry Problem 1297. Arbelos, Semicircles, Diameters, Circle, Incircle, Tangent, Angle Bisector.


van Aubel's theorem. Quadrilateral with Squares. Proof with animation for Tablets, iPad


Geometry Problem 1296. Heron's Formula, Area of a triangle in terms of the three medians.


Geometry Problem 1295. Right Triangle, Incenter, Incircle, Excenter, Excircle, Congruence, Angle.


Geometry Problem 1294. Triangle, Altitudes, Four Squares, Center, Midpoint, Concyclic Points.


Geometry Problem 1293. Triangle, Altitudes, Two Squares, Center, Concurrent Lines, Midpoint.


Clifford's Circle Chain Theorems. This is a step by step
presentation of the first theorem. Clifford discovered, in the ordinary
Euclidean plane, a "sequence or chain of theorems" of increasing
complexity, each building on the last in a natural progression.


Geometry in the Real World, Los Angeles, California.


Geometry Problem 1292. Square, Circle, Right Triangle, Arc, Inradius, Radius, Incircle, Measurement.


Geometry Problem 1291. Three Squares, Collinear Vertices, Midpoint, Congruence.


Bootstrap Mind Maps Index.


Geometry Problem 1290. Triangle, Internal Angle Bisector, Median, Parallel, Measurement, Metric Relations.

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