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DIY Pericentric Lens from a Fresnel and an entocentric lens

Author:optowiki.info (Michael Schaefer)

New Resources

Angle Bisector: Quick Warm Up Questions
巧算長方形周界
ANGLE
Parallel Lines & Related Angles: Quick Reminders
Tangent Plane to a Sphere

Discover Resources

p31m frame
ClearTrace01
Sine angles > 90º investigation
The proof of the volume of a pyramid.
Tangente à un cercle (P. 168, exo 34)
Icosidodecahedron

Discover Topics

Boxplot
Variance
Circle
Tangent Line or Tangent
Pythagoras or Pythagorean Theorem

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