geometry vocabulary · 2019-10-09 · congruent sides and four right angles. two angles in the same...
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MATHO
Geometry Vocabulary
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A part of a line that starts at an endpoint and extends forever
in one direction.
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A quadrilateral with four right angles.
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A triangle with no congruent sides.
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A quadrilateral with four congruent sides and four right
angles.
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Two angles in the same plane with a common vertex and a
common side, but no common interior points.
1 2
1 & 2 are adjacent angles
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Points that lie on the same line.
A R M
A, R, & M are collinear points
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To divide into two congruent parts.
L
K
M
𝑱𝑲 bisects LJM
J
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A corner or point where lines, rays, polygons, or other geometric figures meet.
vertex
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A figure formed by two rays with a common endpoint.
TAR
T A
R
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An undefined term: has a straight path that has no
thickness and extends forever.
H I
𝑯𝑰
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Part of a line consisting of two endpoints and all points
between them.
J K
𝑱𝑲
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Lines in the same plane that do not intersect.
W E
G O
𝑾𝑬 𝑮𝑶
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Lines that intersect at 90 angles.
M
E
𝑴 ⊥ 𝑬
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A closed plane figure formed by three or more segments such that each segment
intersects exactly two other segments only at their endpoints and no two segments with a common endpoint are collinear.
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A four-sided polygon.
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Angles that have the same measure
B
E
B ≅ 𝑬
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Two segments that have the same length.
O K
Y A
𝑶𝑲 ≅ 𝒀𝑨
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A polygon that is both equilateral and equiangular.
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Points that lie in the same plane.
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A polygon that is not regular.
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The point that divides a segment into two congruent segments.
O B C
O is the midpoint of 𝑪𝑩
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Have the same shape but not necessarily the same size.
3
4 5
6
8 10