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green & red circles
Author:
Maurice OReilly
Topic:
Area
,
Circle
,
Pythagoras or Pythagorean Theorem
,
Rectangle
,
Tangent Line or Tangent
GeoGebra
Move pink cross. Observe, describe, estimate, measure, conjecture. What depends on what? Apply Pythagoras ... It the pink cross has coordinates
, then the radius of the red circle is
. Check this ...
New Resources
Special Right Triangles 30°-60°-90° and 45°-45°-90°
Sine in Cartesian and Polar Coordinates
z`]]
Limaçons
Cosine in Cartesian and Polar Coordinates
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Similarity Transformation or Similarity
Planes
Standard Deviation
Surface
Probability