# Geometry Ch 3 Vocab Midterm

## 10 terms · nance

### parallel lines

two lines that are coplanar and do not intersect. The symbol for paralel is ll.

### skew lines

two lines that do not intersect and are not coplanar

### parallel planes

two planes that do not intersect

### transversal

a line that intersects two or more coplanar lines at different points

### corresponding angles

two angles that are formed by two lines and a transversal and occupy corresponding positions

### alternate interior angles

two angles that are formed by two lines and a transversal and that lie between the two lines on opposite sides of the transversal

### alternate exterior angles

two angles that are formed by two lines and a transversal and that lie outside the two lines on opposite sides of the transversal

### consecutive interior angles

two angles that are formed by two lines and a transversal and that lie between the two lines on the same side of the transversal. also called same side interior angles

### same side interior angles

two angles that are formed by two lines and a transversal and that lie between the two lines on the same side of the transversal. Also called consecutive interior angles

### flow proof

a type of proof that uses arrows to show the flow of a logical argument. Statements are connected by arrows to show how each statement comes from the ones before it, and each reason is written below the statement it justifies.