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Recent Additions (Page 47 of 80)




Proposed Problem 252.
Rectangle, isosceles right triangle, square, area.


Proposed Problem 251.
Parallelogram, sides, diagonals, squares, areas.


Proposed Problem 250.
Quadrilateral, sides, diagonals, midpoints, squares.


Proposed Problem 249.
Triangle sides, medians, squares.


Median length, Apollonius' Theorem.


Euclid's Elements Book II, Proposition 12: Law of Cosines.


Euclid's Elements Book II, Proposition 13: Law of Cosines.


Proposed Problem 248.
Napoleon's Theorem III. Inner and outer Napoleon triangles, Area.


Proposed Problem 247.
Napoleon's Theorem II. Internal Equilateral triangles. Inner Napoleon
triangle.


Proposed Problem 246.
Napoleon's Theorem I. External Equilateral triangles. Outer Napoleon
triangle.


Proposed Problem 245. Parallelogram with Equilateral triangles.


Proposed Problem 244. Square, Diagonals, Centers, Distance.


Proposed Problem 243. Triangle with Equilateral triangles,
Parallelogram.


Proposed Problem 242. Triangle with Equilateral triangles,
Parallelogram.


Proposed Problem 241. Triangle with Equilateral triangles,
Congruence.


Proposed Problem 240. Triangle with Equilateral triangles,
Parallelogram.


Proposed Problem 239. Square, Midpoints, Lines, Congruence,
Pythagoras.


Proposed Problem 238. Square, Midpoints, Lines, Congruence.


Proposed Problem 237. Quadrilateral, Midpoints, Exterior line,
Perpendicular lines.


Proposed Problem 236. Quadrilateral, Midpoints, Exterior line,
Perpendicular lines.

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