Ptolemy's Ptools

Properties of Triangles

For these investigations we will be using the tangent ratio for triangles;

Tangent Angle = Opposite side / Adjacent side

Opposite side(object's size) = Adjacent side(distance) X Tangent Angle

Adjacent side(object's distance) = Opposite side(size) / Tangent Angle

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OR

to Tangent Tables

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(last updated 8/31/98)