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Answer Key
Grade 4 Math: Lines, Symmetry & 2D Figures
1.
an exact location with no size
2.
a straight path that extends forever in both directions
3.
part of a line with two endpoints
4.
part of a line with one endpoint that goes forever one way
5.
figure formed by two rays sharing an endpoint
6.
an angle that measures 90 degrees
7.
lines that never meet and stay the same distance apart
8.
lines that intersect to form right angles
9.
line segment
10.
perpendicular lines
11.
4
12.
Yes
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