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Euclid's Elements
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Demonstrations 21 - 40 of 44
The Area of a Triangle as Half a RectangleInscribed Angles That Intercept the Same ArcTangent CirclesDivision of the Opposite Side by an Angle BisectorThe Eyeball Theorem
The Area of a Triangle as Half a Rectangle
Inscribed Angles That Intercept the Same Arc
Tangent Circles
Division of the Opposite Side by an Angle Bisector
The Eyeball Theorem
Equally Distant ChordsSide Lengths Opposite Unequal AnglesTangents to a CircleTangent Chord AngleTriangles: Scalene, Isosceles, and Equilateral
Equally Distant Chords
Side Lengths Opposite Unequal Angles
Tangents to a Circle
Tangent Chord Angle
Triangles: Scalene, Isosceles, and Equilateral
Triangles: Acute, Right, and ObtuseFinding the Least Common Multiple of Two Numbers by FactoringThe Ratio TheoremFinding the Greatest Common Divisor of Two Numbers by FactoringIntersecting Chords Theorem
Triangles: Acute, Right, and Obtuse
Finding the Least Common Multiple of Two Numbers by Factoring
The Ratio Theorem
Finding the Greatest Common Divisor of Two Numbers by Factoring
Intersecting Chords Theorem
Opposite Angles of a Quadrilateral in a CircleThe Primes Are InfiniteThe Eye-Pentagon ConstructionPlatonic SolidsAngles in a Triangle Total 180 Degrees
Opposite Angles of a Quadrilateral in a Circle
The Primes Are Infinite
The Eye-Pentagon Construction
Platonic Solids
Angles in a Triangle Total 180 Degrees

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