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Designs and Circles
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Gravity
Terms in this set (17)
angle
the shape formed by two rays that have a common vertex
angle sum
the sum of the measures of all angles in a polygon
degree
the unit of measure of angles
ray
part of a line with one endpoint
right angle
an angle of exactly 90 degrees
acute angle
an angle less than 90 degrees
line segment
part of a line with two endpoints
vertex (vertices)
the point where two lines meet
parallel lines
two lines that never meet
obtuse angle
an angle greater than 90 degrees and less than 180 degrees
perpendicular lines
two lines that intersect to form right angles
plane
a flat surface that extends in all directions
straight angle
a 180 degree angle
intersecting lines
two lines that cross at some point
radius
half of the diameter of a circle
diameter
a line segment across the center of a circle dividing it in half
chord
a line segment connecting two points on a circle that doesn't go through the center point
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