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What is 1 + 3?
The common endpoint of an angle
two lines that intersect to form right angles
lines that never intersect
part of a line with one endpoint
extends forever in both directions
part of a line with two endpoints
an angle that measures less than 90 degrees
An angle that measures more than 90 degrees but less than 180 degrees
when 2 lines cross each other
an angle that measures exactly 90 degrees
an angle that measures 180 degrees
the distance around a figure.
A line that goes up and down
a line that going from SIDE TO SIDE
the space inside a shape
balance, same on both sides