3rd Grade STAAR Geometry
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14 Terms
parallelogram
A quadrilateral with two pairs of parallel sides
parallel sides
lines or segments that are the same distance apart and never touch.
Angle
A figure formed by two rays that share a common endpoint.
Triangle
A polygon with three sides and three angles.
Quadrilateral
A polygon with four sides and four angles.
Perimeter
The distance around a shape, calculated by adding the lengths of all sides.
Area
The amount of space inside a two-dimensional shape, measured in square units.
Circle
A round shape where all points are the same distance from the center.
Vertex
The point where two sides of a polygon meet.
Line Segment
A part of a line that has two endpoints.
Symmetry
A property where one half of a shape is a mirror image of the other half.
Polygon
A closed figure formed by a finite number of straight line segments.
Congruent
Figures that have the same shape and size.
Right Angle
An angle that measures exactly 90 degrees.
