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Geometry and Measurement Review
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Gravity
Terms in this set (20)
line
a straight mark that extends forever in both directions
line segment
part of a line that is bounded by 2 distinct end points
ray
a portion of a line that starts at a point and extends forever in the opposite direction
vertex
point where 2 or more line segments meet (a corner)
intersecting lines
2 or more lines that meet or cross over each other
perpendicular lines
lines that intersect (or will intersect when extended) to create a 90 degree angle
parallel lines
2 lines that are always the same distance apart, and never touch
right angle
an angle measuring exactly 90 degrees
acute angle
an angle measuring greater than 0 degrees, but less than 90 degrees
obtuse angle
an angle measuring greater than 90 degrees, but less than 180 degrees
straight angle
an angle measuring exactly 180 degrees
perimeter
the distance around a figure
area
the number of square units needed to cover a surface
triangle
a three-sided polygon
quadrilateral
a four-sided polygon
parallelogram
a quadrilateral that has 2 pairs of parallel sides
trapezoid
a quadrilateral with exactly one pair of parallel sides
square
a quadrilateral and parallelogram that has 4 equal sides and 4 right angles
rectangle
a quadrilateral and parallelogram that has opposite sides that are equal and 4 right angles
rhombus
a quadrilateral and parallelogram that has opposite sides that are equal and opposite angles that are equal (no right angles)
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