4th Grade Geometry Vocabulary

a straight path that extends in both directions with no end

• line

• line segment

• parallel

• vertical

a line with two end points

• vertical

• pair

• line segment

• ray

a line with a starting point but no end point ... it continues on in one direction

• straight angle

• line

• line segment

• ray

lines that never intersect ... they are always an equal distance apart

• parallel lines

• perpendicular lines

• line segment

• ray

two things used together

• vertical

• symmetry

• line segment

• pair

left to right

side to side

• vertical

• horizontal

• symmetry

• pair

up and down

top to bottom

• vertical

• horizontal

• symmetry

• angle

an IMAGINARY line that divides a shape into two identical halves

the two halves are a reflection of each other...they are a mirror image

• vertical

• horizontal

• symmetry

• angle

lines that intersect (or meet) that make right angles

• vertical

• horizontal

• parallel lines

• perpendicular lines

the space inside the vertex (or the point)

• angle

• shape

• line

• area