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Grade 4 Chapter 10 Vocabulary
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Terms in this set (21)
point
an exact location in space
line
straight path of points that continues without end in both directions
line segment
part of a line between two endpoints
ray
part of a line with one endpoint that continues without end in one direction
angle
formed by 2 rays or line segments that have the same endpoint
right angle
forms a square corner; exactly 90 degrees
straight angle
forms a straight line; exactly 180 degrees
acute angle
less than a right angle; 1-89 degrees
obtuse angle
greater than a right angle and less than a straight angle; 91 - 179 degrees
acute triangle
a triangle with 3 acute angles
right triangle
a triangle with one right angle
obtuse triangle
a triangle with one obtuse angle
intersecting lines
lines that cross at exactly one point
parallel lines
lines that are always the same distance apart and NEVER intersect
perpendicular lines
lines that intersect to form 4 right angles
trapezoid
QUADRILATERAL with 1 pair of parallel sides
parallelogram
QUADRILATERAL with 2 pairs of parallel sides and 2 pairs of sides of equal length
rhombus
QUADRILATERAL with 2 pairs of parallel sides and 4 sides of equal length
rectangle
QUADRILATERAL with 2 pairs of parallel sides, 2 pairs of sides of equal length, 4 right angles
square
QUADRILATERAL with 2 pairs of parallel sides, 4 sides of equal length, and 4 right angles
quadrilateral
a polygon with 4 sides
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