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# Geometry Glossary - T a|b|c|d|e|g|h|i|k|l|m|o|p|q|r|s|t|v|x|y|

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# tangent:

The tangent of a right angle is the ratio of the length of the opposite leg to the length of the adjacent leg.

# tangent circles:

Two coplanar circles which are tangent to the same line at the same point.

# tangent segment:

A segment that contains a point of tangency and another point of a tangent line to a circle.

# tangent to a circle:

A line that is coplanar with the circle and intersects the circle in exactly one point.

# theorem:

A statement that has been proved true.

# translation:

A translation in a plane from A to A' is a transformation which maps any point P into a point P' such that PP' = AA' and PP' || AA'.

# transversal:

A line, ray, or segment that intersects two or more coplanar lines, rays, or segments, each at a different point.

# trapezoid:

A quadrilateral with exactly one pair of parallel sides.

# triangle:

A figure formed by three segments joining three noncollinear points.

Note: The terms in this collection may not be entirely accurate.
They are for reference only.