# Geometry Vocab Words

### By:Kamya Pentakota

## adjacent angles

meaning- when they have a common side and a common vertex and don’t overlap

## alternate exterior angles

meaning- when two lines crossed which is called transversal they need to be the opposite sides of the transversal

## alternate interior angles

meaning- on opposite sides of the transversal but its inside the two lines.

## complementary angles

when two angles add up to 90 degrees

## corresponding angles

the two parallel lines are crossed over by a transversal thats when the two angles are matching from there same sides.

## supplementary angles

when two angles add up to 180 degrees.

## parallel lines

when two lines are the same distance apart and will never intersect.

## perpendicular lines

when two lines that intersect each other create right angles.

## transversal line

a line that crosses two parallel lines.

## vertical angles

angles that are opposite from each other when two lines intersect.

## perimeter

the distance around a flat object (polygon). you can find the perimeter by adding all the sides up.

## area

the amount of space inside a flat object (polygon).

## surface area

the total or the sum of faces from a 3D object.

## volume

the amount of space in a 3D object or shape.

## circumference

the distance around a circle.

## diameter

a line that cuts through the center of a circle.

## radius

a line that is 1/2 of a diameter.

## face

a flat surface, typically outside surface of a 3D object.

## edge

a line that connects faces together, it is a line where two faces meet.

## vertex

a point where two or more straight lines meet (corner).