Lentes côncavas e convexa

作者：Sandro Ricardo De Souza, Tom Walsh

Move the tip of the "Object" arrow to move the object. Move the point named " Focus' " to change the focal length. Move the point named " Focus' " to the right side of the lens to change to a concave lens.

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Is this a circle equation?
Symmetries of a rectangle
Qn 1 reflection
Exercise 11.1.33
Parallelism

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等腰三角形
線性函數
垂心
Linear Equations
圓錐曲線

Lentes côncavas e convexa

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