Level 20

Author:Colin Beveridge

Level 20 of http://euclidthegame.org/Level20.html asks you to construct the outer tangent to two given circles (here, a, with centre A; and b, with centre B). Here's how I'd do it.

New Resources

Squaring a Rectangle (PST Version)
Conditional Probability in Two-Way Tables
Segment Addition Postulate (Mild Questions)
Basic and Compound Inequality Illustrator
Choosing a Method to Find Triangle Area

Discover Resources

Ghost Graph - Exploring Extraneous Roots
Circles and GeoGebra pckt2 pg21
Untitled
deljenje duzi na jednake delove
Flower, Amelie,GER

Discover Topics

Numbers
Division
Ratios
Kite
Similarity Transformation or Similarity