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Recent Additions (Page 34 of 80)




Proposed Problem 427.
Triangle, Two Altitudes, Square of a Side. 

Euclid's Elements Book I, Proposition 8: (SideSideSide SSS Congruence) 

Euclid's Elements Book I, Proposition 7
Given two straight lines constructed on a straight line (from its
extremities) and meeting in a point,... 

Euclid's Elements Book I, Proposition 6: Converse of I.5 

Euclid's Elements Book I, Proposition 5: (Pons Asinorum) Isosceles
triangles 

Proposed Problem 426.
Triangle, Circumradius, Circumcenter, concurrent Cevians. 

Proposed Problem 425.
Quadrilateral, Triangle, Angles, 10, 20, 50 degrees, Congruence. 

Proposed Problem 424.
Triangle, Cevian, Angle, 90 degree, Congruence. 

Euclid's Elements Book I, Proposition 4: (SideAngleSide SAS) 

Euclid's Elements Book I, Proposition 3: Given two unequal straight
lines, to cut off from the greater a straight line equal to the less 

Euclid's Elements Book I, Proposition 2: To place at a given point (as
an extremity) a straight line equal to a given straight line 

Euclid's Elements Book I, Proposition 1: On a given finite line to
construct an equilateral triangle. 

Proposed Problem 422.
Triangle, 24, 30 degree, Angle, Congruence. 

Proposed Problem 412.
Triangle, Angles, Congruence. 

Proposed Problem 411.
Triangle, Median, Angles. 

Area of a Square Index.

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