# Angles

## 23 terms

### complementary angles

two angles that add up to 90º

### supplementary angles

two angles that add up to 180º

### bisector

a ray that splits an angle in half

### linear pairs

two angles that have two sides that form a line and are supplementary

### angle

two rays that share an endpoint

### vertex

common endpoint of two rays to form an angle

### acute angle

an angle smaller than 90º but more than 0º

### corresponding angles

two angles that are in the same position along the transversal on different parallel lines (always have one interior one exterior)

### obtuse angles

and angle bigger than 90º but less than 180º

### right angle

and angle with the measurement of 90º

### perpendicular

when two lines meet to make a right angle

### straight angle

an angle that measures 180º

two angles that share a common vertex and side

### parallel lines

two lines in the same plane that do not intersect

### transversal

a line that intersects two parallel lines

### alternate interior angles

congruent angles that lie between the two parallel lines on opposite sides of the transversal and in the interior of the parallel lines

### alternate exterior

lie outside the parallel lines on opposite sides of the transversal

### point

a precise location or place on a plane represent by a dot

### line

a plane that is straight, long, and infinitely thin

### segment

a straight line which links two points without extending beyond them

### ray

a portion of a line that starts at a point and infinitely goes on in a particular direction

### midpoint

a point on a line segment that divides it into two equal parts

### vertical angle

formend by two intersecting lines that don't share a side. Vertical Angles are always the same measure