# Points, Angles, Lines (Basic Geometry)

### 44 terms by kmazzarella

#### Study  only

Flashcards Flashcards

Scatter Scatter

Scatter Scatter

## Create a new folder

### collinear points

points on the same line

### congruent line segment

Line segments that have the same length

### point

a location in space that has no size

### line

a set of points that form a stright path extending in oppsite directions without end

### angle

figure formed by two rays with the same initial point

### geometry

the pure mathematics of points and lines and curves and surfaces

### noncolliear points

are points that do not lie on the same line

### coplanar points

points all in one plane

### intersection

the act of intersecting (as joining by causing your path to intersect your target's path), a place where two or more points meet

### midpoint of a segment

The point that divides a segment into two congruent segments.

### endpoints

points on the ends of line segments

### plane

two dimensional flat surface, extends forever.

### space

contains at least 4 points not in one line

### obtuse angle

an angle between 90 and 180 degrees

### straight angle

an angle of 180 degrees

formed by rays

### opposite rays

two rays with the same initial point that go in opposite directions

### vertex

the point of intersection of lines or the point opposite the base of a figure

### bisector of a segment

a line, segment, ray, or plane that intersects the segment at its midpoint

### acute angle

an angle less than 90 degrees but more than 0 degrees

### congruent angles

Angles that have the same measure

### right angle

the 90 degree angle between two perpendicular lines

### vertical angles

angles are formed opposite of each other when two lines intersect

### bisector of an angle

the ray that divides the angle into two congruent adjacent angles

### perpendicular lines

two lines that meet and form a right angle

assumptions

### noncoplaner points

points that are not in the same plane

### segment

a part of a line with two endpoints

Two angles with a common side, a common vertex, and no common points within the angles

### supplementary angles

Two angles that add to 180º are called

### complementary angles

if the sum of two angles is 90%

### degree

unit based to measure angles ( symbol )

### ray

Part of a line that has one endpoint and extends indefinitely in one direction.

### perpendicular bisector

A line that is perpendicular to a segment at its midpoint.

### corresponding angles

two angles in corresponding positions relative to two lines cut by a transversal

### alternate exterior angles

Two nonadjacent exterior angles on opposite of the transversal.

### same side-interior angles

interior angles on the same side of a transversal

### exterior lines

The angle on the outside of a transversal.

### skew lines

noncoplanar lines that do not intersect

### parallel planes

planes that don't intersect

parallel lined

### transversal

is a line that intersects each of two other coplanar lines in different points

### interior angles

the angle inside of a transversal

### alternate interior angles

two nonadjacent interior angles on opposite of the transversal

Example: