
Geometry 

Lessons 
Geometry
Lesson Plans  Discovering Pi, Exploring the
Sphere, Exploring Similarity Using Scale Drawings, Greedy
Triangle, Measuring Circles, Measuring the Earth, Planning
a School Garden, Plotting Coordinates on a Geoboard, Polygons,
Tangrams, ThreeDimensional Shapes, Water to the Max, Web
of Lines. 

Daily
Lessons  Structured Curriculum Handbook: Reasoning
& Proof, Parallel & Perpendicular Lines & Congruent
Triangles to Exploring Quadrilaterals, Connecting Proportions
& Similarity . 
Geometry
Resources  Text booklike instructions, examples
& formulas: Trigonometry, Inversive, Coordinates, Inequalities,
Sangaku Problems & more. 
Formulas
 Lines, Distances, Angles, Concurrence, Collinearity, Triangles,
Quadrilaterals, Regular Polygons, Circles Conics, Cartesian,
Cylindrical, Spherical, Rotation & Polar Coordinates, Cartesian
Symmetries, Direction Angles & Cosines, Planes Regular Polyhedra,
Cylinders, Cones, Spheres & Torus. 


Geometry


Lessons 
AAA
Math  Geometry Facts & Calculations, Area,
Perimeter, Circumference, Surface Area, Volume, Cubes, Rectangular
& Triangular Prisms, Cones, Cylinders, Spheres & Pyramids.

Cool
Math  Online lessons & examples on: Polyhedra
Gallery, Tessellations, Congruency, Interior Angles of Regular
Polygons. 
High
School Lessons  Euclidean/Plane (proofs), Conic
Sections/Circles (ellipses, parabolas, hyperbolas) Constructions,
Coordinate Plane, Triangles, Polygons, Polyhedra (Platonic
& Archimedean solids, prisms) NonEuclidean, (elliptical/spherical,
hyperbolic, projective), Symmetry & Tessellations. 
Middle
School Lessons  TwoDimensional, ( area, perimeter,
proofs), Conic Sections, Circles (ellipses, degrees, radians),
Triangles, Polygons 3D & Higher, (volume, spheres, cylinders,
cones) & Polyhedra (cubes, pyramids, prisms, nets). 
Video
& Text Lessons  Covers everything from Arcs
& Chords, Area of Regular Polygons Law of Cosines &
Sines to Linear Graphs, Special Quadrilaterals, Surface Area
and Volume.
Trigonometry 

