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

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# scalene triangle:

A triangle with no congruent sides.

# secant:

A line that intersects the circle in two points.

# sector of a circle:

The region bounded by an arc of a circle and two radii whose endpoints are endpoints of that arc.

# segment:

Segment XB is the set of points consisting of points A, B, and all points between A and B.

# similar polygons:

Polygons in which corresponding angles are congruent and the ratios of the lengths of corresponding sides are equal.

# similar triangles:

Triangles in which corresponding angles are congruent and corresponding sides are proportional.

# skew lines:

Noncoplanar lines.

# slope:

The slope of a segment PIP2, with endpoints P1 (x1,y1) and P2(X2,Y2), is the ratio (y2 - y1)/(x2 - x1).

# space:

The set of all points.

# sphere:

The set of all points in space at a given distance from a given point called the center.

# square:

A rectangle with four congruent sides.

# standard form:

The standard form of an equation of a line is an equation of the form ax + by = c, where a and b are not both zero, and where a > 0.

# straight angle:

An angle with a measure of 180.

# supplementary angles:

Angles whose sum of their measures is 180. Each angle is called a supplement of the other.

# symmetric figures:

Figures that are their own mirror images about a line or about a plane.

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