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triangle with measuring length markings on blackboard, top view. space for text
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JPG 300 DPI
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Author:
dreamstime
License:
buy for Personal Use & Commercial
File Type:
JPG
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accessories
angle
background
black
blackboard
centimeter
chalk
chalkboard
college
color
copy
design
dirty
drafting
drawing
education
engineering
equipment
geometry
item
knowledge
learn
learning
length
markings
math
mathematical
mathematics
measure
measurement
measuring
number
object
protractor
ruler
school
science
shape
space
stationery
study
supplies
teach
text
tool
top
triangle
university
view
work
view