Ellipse tool using semi axes

acron shared this question 4 years ago
Answered

From an old entry: https://help.geogebra.org/t... Was this implemented?


I would like to create an ellipse (semi-ellipse) using the semi axes. The A = π a b, where a and b are the lengths of the axes.

Comments (6)

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I am trying to use similar ellipses to create a proof of Pythagorean Theorem segment DG, EH, and FI are semi-radii, but the points G, H ,I do not lock to lines h, i, j respectively. When d = 1, the semi-ellipse would be a semicircle; changing d would alter the semi-axes by the same %. <1 is minor axis & >1 is major axis.


This is the idea I am working with.

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You could create G, H and I as intersections of circles with given radii and lines h, i and j.

This way the points "lock" to the lines.

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an example (use navigation bar):

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Hi,

hope to help...

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hope to help

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Thanks all!

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