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Geometry Vocabulary
n/a
18
Mathematics
4th Grade
01/17/2014

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Cards

Term
right triangle
Definition
a triangle with a right angle
Term
acute triangle
Definition
a triangle with all acute angles
Term
obtuse triangle
Definition
a triangle with an obtuse angle
Term
scalene triangle
Definition
a triangle with three different side lengths (no equal sides)
Term
isosceles triangle
Definition
a triangle with two congruent (equal) sides
Term
equilateral triangle
Definition
a triangle with three equal side lengths
Term
right angle
Definition
an angle whose measure is 90 degrees
Term
acute angle
Definition
an angle whose measure is less than 90 degrees
Term
obtuse angle
Definition
an angle whose measure is more than 90 degrees but less than 180 degrees
Term
point
Definition
a dot that names a location on a plane
Term
line
Definition
a never-ending straight path that extends in both directions forever
Term
line segment
Definition
a part of a line between two endpoints
Term
ray
Definition
part of a line that extends in one direction from one endpoint
Term
intersecting lines
Definition
lines that cross and meet at a point
Term
perpendicular lines
Definition
line that intersect to form a right angle
Term
parallel lines
Definition
lines that never intersect and are an equal measure apart
Term
vertex
Definition
the endpoint that is shared by 2 rays that form an angle
Term
angle
Definition
formed by 2 rays that share the same endpoint
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