Angle measuring less than 90 degrees
Angle measuring more than 90 degrees
Angle measuring exactly 90 degrees
lying on the same line
lying on the same plane
point, line, plane
Building blocks of Geometry, undefined terms
two points (the endpoints) all the points between them that are on the line containing them.
segments that have the same measure
a point ON a line segment that is equally distant from both endpoints.
all points on a line that lie on one side of a point (the ray's endpoint).
angles that have the same measure
formed by two rays that share an endpoint so long as they do not overlap
a ray that shares the vertex of the angle and divides the angle into two congruent angles.
the unit in which angles are measured
formed by intersecting lines and do not share a common/adjacent side.
Linear Pair of Angles
a pair of angles that share a side and their non-shared side form a straight line (they are supplementary)
two angles whose sum is 180 degrees
two angles whose sum is 90 degrees
a pair of angles with a common vertex and a common side, but no common interior points
The number of nonoverlapping unit squares of a given size that will exactly cover the interior of a plane figure.
base of triangle
Any side of a triangle.
Given three points A, B, and C, B is between A and C if and only if all three of the points lie on the same line, and AB + BC = AC
To divide into two congruent parts
the distance around a circle
points that lie on the same line.
A method of creating a figure that is considered to be mathematically precise. Figures may be constructed by using a compass and straightedge, geometry software, or paper folding.
A number used to identify the location of a point.
a plane that is divided into four regions by a horizontal line called the x-axis and a vertical line called the y-axis.
points that lie on the same plane
A unit used to measure distances around a circle. One degree equals 1/360 of a full circle.
A line segment that passes through the center of a circle and has its endpoints on the circle. It describes how wide the circle is.
the absolute value of the difference of the coordinates of the points.
a point at the end of a segment or ray
exterior of an angle
The set of all points outside an angle.
A line segment extending from the vertex or apex of a figure to its base and forming a right angle with the base or plane that contains the base.
the side of a right triangle opposite the right angle