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P. 18
Attributes of figures
A line without any curves or breaks is called a straight line. A line that bends
without any breaks is called a curved line.
Straight line Curved line
A special angle that forms a square corner and measures 90˚ is called a right
angle. Lines that never cross are called parallel lines.
90° Parallel lines
Right angle
There are more attributes.
Fold a figure in half that Draw a figure without
the two parts match taking the pen
perfectly off the paper
Example 1 Mark all the figures that have an attribute given in the .
⑴
Right
angle
⑵
Parallel
lines
2. True-False figures 15
A line without any curves or breaks is called a straight line. A line that bends
without any breaks is called a curved line.
Straight line Curved line
A special angle that forms a square corner and measures 90˚ is called a right
angle. Lines that never cross are called parallel lines.
90° Parallel lines
Right angle
There are more attributes.
Fold a figure in half that Draw a figure without
the two parts match taking the pen
perfectly off the paper
Example 1 Mark all the figures that have an attribute given in the .
⑴
Right
angle
⑵
Parallel
lines
2. True-False figures 15
