Math Terms

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23 Terms

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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