Math exam vocab

Point

A specific location in space with no dimensions.

Collinear

Points that lie on the same straight line.

Midpoint

The point that divides a segment into two equal parts.

Right Angle

An angle that measures exactly 90 degrees.

Parallel Lines

Lines in the same plane that never intersect.

Complementary Angles

Two angles whose measures add up to 90 degrees.

Transversal

A line that intersects two or more other lines.

Perpendicular Bisector

A line that divides a segment into two equal parts at a right angle.

Isosceles Triangle

A triangle with at least two sides of equal length.

Trapezoid

A four-sided figure with at least one pair of parallel sides.

Rectangle

A quadrilateral with four right angles.

Line

A straight path that extends infinitely in both directions.

Non-Collinear

Points that do not lie on the same straight line.

Segment Bisector

A point, line, or ray that divides a segment into two equal parts.

Ray

A part of a line that has one endpoint and extends infinitely in one direction.

Perpendicular

Lines that intersect at a right angle.

Supplementary Angles

Two angles whose measures add up to 180 degrees.

Altitude

A segment from a vertex of a figure perpendicular to the opposite side.

Midsegment

A segment connecting the midpoints of two sides of a triangle.

Isosceles Trapezoid

A trapezoid with a pair of equal-length sides.

Kite

A quadrilateral with two pairs of adjacent sides that are equal.

Line Segment

A part of a line that has two endpoints.

Coplanar

Points that lie on the same plane.

Acute Angle

An angle that measures less than 90 degrees.

Angle

A figure formed by two rays with a common endpoint.

Skew Lines

Lines that do not intersect and are not parallel.

Vertical Angles

Angles opposite each other when two lines intersect.

Median

A segment that connects a vertex of a triangle to the midpoint of the opposite side.

Equilateral Triangle

A triangle with all three sides of equal length.

Rhombus

A quadrilateral with all four sides of equal length.

Plane

A flat surface that extends infinitely in all directions.

Congruent

Figures that have the same shape and size.

Obtuse Angle

An angle that measures more than 90 degrees.

Diagonal

A segment that connects two non-adjacent vertices of a polygon.

Adjacent Angles

Two angles that share a common side and vertex.

Linear Pair

Two adjacent angles that form a straight line.

Angle Bisector

A ray that divides an angle into two equal angles.

Scalene Triangle

A triangle with all sides of different lengths.

Parallelogram

A quadrilateral with both pairs of opposite sides parallel.

Square

A quadrilateral with four equal sides and four right angles.

Transitive Property

If a = b and b = c, then a = c.

Addition Property

If a = b, then a + c = b + c.

Segment Addition Postulate

If B is between A and C, then AB + BC = AC.

Reflexive Property

For any number a, a = a.

Substitution Property

If a = b, then b can be substituted for a in any expression.

Angle Addition Postulate

If point B is in the interior of angle AOC, then angle AOB + angle BOC = angle AOC.