| Given a triangle, construct the deltoid tangent to its sides. |
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| Given a triangle, construct the deltoid tangent to its sides. |
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| Show that ellipse of any shape can be inscribed in a deltoid and be able to move freely. |
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| Show how a deltoid of maximal size slides inside a stationary astroid. |
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| Construct an animation displaying a nephroid of least size rotating about a fixed deltoid. |
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