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Science
Physics
Geometric Optics
Math Terms
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Physics
Geometric Optics
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23 Terms
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1
collinear
two or more points that lie on the same line
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2
line segment
a subset of a line consisting of two endpoints and all points between them
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3
midpoint of a segment
To a point on a line segment that divides it into two equal lengths
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4
segment bisector
a line that intersects a line segment at its midpoint
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5
ray
a subset of a line consisting of one endpoint and all points to one side
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6
opposite rays
two rays with a common endpoint that point in opposite directions to form a line
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7
angle
two rays with a common endpoint
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8
vertex
the common endpoint of two rays
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9
interior of an angle
all points lying between two rays in an angle
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10
adjacent angles
two angles sharing a common vertex and a common ray between them
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11
linear pair
adjacent angles whose non-common rays form opposite rays
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12
vertical angles
a pair of non-adjacent angles formed by the intersection of two lines
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13
angle bisector
a line that divides an angle into two angles of equal measure
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14
acute angle
an angle whose measure is greater than 0° and less than 90°
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15
obtuse angle
an angle whose measure is greater than 90° and less than 180°
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16
right angle
an angle whose measure is 90°
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17
reflex angle
an angle whose measure is greater than 180°
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18
straight angle
an angle whose measure is 180°
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19
complementary angles
two angles whose measures sum to 90°
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20
supplementary angles
two angles whose measures sum to 180°
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21
perpendicular lines
two lines that intersect to form angles that measure 90°
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22
perpendicular bisector
a line that intersects a line segment at its midpoint and is perpendicular to the line segment
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23
congruent
two objects with equal lengths and/or equal angle measures
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