# Math vocab

## 30 terms

### Bisector

Divides a line segment or angle into two equal parts

### Congruent

Having the exact same shape or size

### Parallel

Two lines in the same plane that are the same distance apart and will NEVER touch.

### Perpendicular

Two lines that intersect to form right angles

### Line segment

The part of a line that is between two points

### Endpoint

The points st the end of a line segment

### Intersection

The point at which two or more lines intersect or cross

### Ray

A line that starts at a point and goes on forever in one direction.

A reflection

A Translation

rotation

### coordinate plane

a plane is a flat surface with no thickness. Coordinate planes have lines on them

### construction

to draw geometric shapes and lines with a compass and a straight edge

### transformation

reflection, translation, rotation and dilation are examples.

### rotation

turning a figure around a fixed point

### reflection

a lin eon a plane is like a mirror. A geometric figure is flipped over on the other side of the line

### Dilation

changes the size of a figure

exactly 90*

exactly 180*

### vertex

common end point of two rays

### angle

formed by two rays with a vertex. The two rays are the sides of the angle

exactly 90*

less than 90*

### Obtuse angle

more than 90 but less than 180

exactly 180*

### skew

lines that are not on the same plane and do not intersect but they aren't parallel

have a common vertex and a common side but no common interior points

### vertical angles

the opposite angles formed by two intersecting lines.

### Transversal

a line that intersects 2 or more lines

### Corresponding angles

On the same side of the transversal and are both above and below .