- Elementary Geometry
- Triangle Inscribed in a Circle
- Inscribe a circle in a triangle.
- Circle Through Three Points
- Medians and the Centroid
- Divide a circle into three equal sectors.
- A quadrilateral inscribed in a circle
- The Diagonals of Trapezoid
- Tangents from point to circle
- The altitude of a right angle (and its children)
- Draw the sine squared of an angle
- The Secant Theorem
- Pappus' Theorem
- Pole and Polar 1
- Inscribe a chord in a given arc of a circle
- Heron's Formula, Geometric Proof
- The Locus of Points Equidistant from Two Circles
- Archimedes' Formula for π (pi)
- Angle Bisector, ratio of sides
- Draw Length Squared
- Similarity points
- Centroid of a polygon
- Centroid of a triangle
- I am a rhombus
- Rhombus & Circle, 2
Elementary Geometry
- Author:
- Ryan Hirst
Theorems from plane geometry. Euclid's Elements are here: http://www.geogebratube.org/collection/show/id/2554
