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3rd grade Geometry Vocabulary with term definitions.
Terms in this set (19)
Square
A quadrilateral with 4 equal sides and 4 right angles.
Opposite sides are parallel.
Rectangle
A Quadrilateral with 4 sides and 4 right angles.
Opposite sides are parallel.
Triangle
A polygon with 3 sides and 3 angles.
Right Angle
An angle that is 90 degrees (It makes a square in the corner).
Quadrilateral
A polygon with 4 sides and 4 angles.
Parallelogram
A quadrilateral with two sets of parallel sides.
Trapezoid
A quadrilateral with only one pair of parallel sides.
Rhombus
A parallelogram with four equal sides and equal opposite angles.
Parallel Lines
Two lines that never get closer together or farther apart.
Perpendicular Lines
Lines that intersect to form right angles
Intersecting Lines
Two lines that cross at any angle.
Obtuse Angle
Two lines that intersect at more than a 90 degree angle.
The angle with the big caboose.
Acute Angle
Two lines that intersect at less than a 90 degree angle.
"Aww, it's so cute!"
Pentagon
Closed shape that has 5 sides.
Hexagon
Closed shape that has 6 sides.
Octagon
Closed shape that has 8 sides.
Polygon
Any closed shape with 3 or more sides
A fancy name for a shape.
Closed figure
A shape in which all sides touch.
Open figure
A shape in which all sides do not touch.
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