Geometry Vocabulary
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28 Terms
Quadrilateral
a polygon with 4 sides
Parallelogram
a quadrilateral with 2 pairs of parallel sides.
Rhombus
a quadrilateral with 2 pairs of parallel sides. Opposite sides are congruent
Trapezoid
a quadrilateral that has exactly one pair of parallel sides
Square
a rectangle whose sides are all the same length
line segment
a straight path joining 2 points
Ray
a straight path that starts at one point (endpoint) and continues forever in 1 direction
Parallel Lines
never cross or meet no matter how far they are extended
Intersecting Lines
meeting or crossing one another
Perpendicular lines
crossing or meeting at right angles
Line(s) of Symmetry
having 2 parts that are mirror images of each other
Equilateral triangle
all sides are the same length
Isosceles triangle
2 sides of the triangle are the same length
Scalene triangle
no sides are the same length
Acute triangle
all three angles are less than 90 degrees
Right triangle
a triangle with one right angle
Obtuse triangle
a triangle with one obtuse angle
acute angle
has a measure greater than 0 degrees, but less than 90 degrees
obtuse angle
an angle that has a measure of 91- 179 degrees
right angle
an angle that is exactly 90 degrees
straight angle
a straight angle measures exactly 180 degrees
full rotation
a complete turn or full circle
rectangle
a parallelogram with 4 right angles
pentagon
a polygon with 5 sides
octagon
a polygon with 8 sides
hexagon
a polygon with six sides
point
an exact location in space
line
a straight path that extends infinitely in opposite directions
Note 
Flashcards (50)