Geometry Vocab

An acute angle is defined as an angle with a degree measure less than 90 degrees, making all other options incorrect.

Distance refers to the physical space between two points, not the time, speed, or weight associated with the travel between them.

Perpendicular lines are two lines that intersect at a 90-degree angle, forming right angles.

An acute triangle is a type of triangle where all three angles are less than 90 degrees, making them acute angles.

The correct definition of 'exterior' in terms of an angle is when a point is neither on the angle nor in the interior of the angle, placing it outside the angle.

In geometry, a plane refers to a flat surface without depth or boundaries.

Adjacent angles are angles that share a common vertex and side, but do not overlap in any way. They are typically next to each other and do not necessarily add up to any specific measurement.

To be considered in the interior of an angle, a point must fulfill the specific criteria of not lying on the angle itself and lying on a segment with endpoints on the sides of the angle.

A point is a fundamental concept in geometry, denoting a specific location in space without any dimensions.

An angle is formed by two rays meeting at a common endpoint, not by shapes or specific measurements like distances or degrees.

In geometry, a line is a one-dimensional figure that extends infinitely in both directions. It has no endpoints and is considered one of the basic building blocks in the study of shapes and figures.

A postulate in geometry is a statement that is assumed to be true without requiring proof. It serves as a basic starting point for building geometric arguments and proofs.

An angle bisector is a ray that divides an angle into two equal parts, creating two congruent angles.

A line segment is defined by its two distinct endpoints and all the points along the line connecting those two endpoints. It is a straight path between two points.

Collinear points are points that can be connected by a single straight line.

A linear pair specifically refers to two angles that are adjacent and form a straight line when combined.

A right angle is specifically defined as having a measure of 90 degrees, not 180, 45, or 270 degrees.

Complementary angles have measures that add up to 90 degrees, not 180, 45, or 120 degrees.

A midpoint is specifically defined as the point that lies exactly halfway between the endpoints of a segment, dividing the segment into two equal parts.

A segment bisector is specifically defined as a segment, line, or plane that intersects a segment at its midpoint, not just a line that divides a segment into two equal parts, a point that lies on a segment, or a segment that connects two endpoints.

Congruent refers to figures or objects that have the same measure or dimensions. It means they are identical in size and shape.

An obtuse angle is specifically defined as having a degree measure greater than 90 but less than 180, distinguishing it from acute angles (less than 90 degrees) and right angles (exactly 90 degrees) as well as reflex angles (greater than 180 degrees).

Space is defined as the set of all points and is not limited to just the area above the earth's atmosphere or a void without any matter. It is not just a place for astronauts to conduct research, but encompasses everything in the universe.

In geometry, coplanar points are points that lie within the same two-dimensional plane.

Opposite rays are two rays that have the same starting point and go in exactly opposite directions.

Supplementary angles are a pair of angles whose measures add up to 180 degrees. This concept is important in geometry and can help solve various problems involving angle measurements.

A degree is a specific unit used in geometry and trigonometry to quantify angles and rotations.

A perpendicular bisector specifically refers to a line, segment, or ray in a triangle that meets the criteria of passing through the midpoint of a side and being perpendicular to that side.

Undefined terms in geometry are foundational concepts that are assumed to be understood without further explanation. They serve as building blocks for defining other geometric shapes and properties.