angle

animation

background

black

centimeter

clipping

collection

degree

design

drawing

education

equipment

geometry

graphic

icon

instrument

isolated

learn

line

math

mathematics

measure

measurement

metric

millimeter

motion

number

object

office

outline

plastic

precise

precision

protractor

rule

ruler

scale

school

straight

study

subject

supplies

supply

symbol

thin

tool

transparent

triangle

triangular

width

work