Geometry Vocabulary

Geometry is a unit filled with vocabulary! It all comes at once, so it can be challenging for children to remember all the different words and meanings.

Ask your mathematician about these words:

polygon
quadrilateral
rectangle
square
triangle
pentagon

parallel
perpendicular

right angle

acute angle

obtuse angle

line

line segment

ray

You can even sort these words together!

Not sure what some of the words mean yourself? Click here for a wonderful, illustrated math dictionary.