Geometry Definitions
Name That Figure
Quadrilaterals
Polygons
Miscellaneous
100
An exact location in space
What is a point?
100
Another name for line segment XY
What is line segment YX?
100
A quadrilateral with all right angles
What is a rectangle?
100
A polygon in which all sides are the same length and all angles have the same measure
What is a regular polygon?
100
The name for an 8-sided figure
What is an octagon?
200
A straight path extending forever in both directions
What is a line?
200
Another name for line JK
What is line KJ?
200
A quadrilateral with all sides the same length
What is a rhombus?
200
The number of sides that a polygon must have
What is 3?
200
Two lines that intersect at right angles
What are perpendicular lines?
300
A part of a line between and including two endpoints
What is a line segment?
300
Another name for angle ABC
What is angle CBA?
300
A quadrilateral with four equal sides and four right angles
What is a square?
300
The parts of a polygon that must not cross and must form one closed path
What are sides?
300
Lines in a plane that never meet
What are parallel lines?
400
A part of a line that starts at an endpoint and goes forever in one direction
What is a ray?
400
A ray with endpoint F and another point G on it
What is ray FG?
400
A quadrilateral with two pairs of parallel sides
What is a parallelogram?
400
A polygon in which all vertices are pushed outward
What is a convex polygon?
400
•Z
What is point Z?
500
The point at which the rays of an angle meet
What is the vertex?
500
Two names for a ray with endpoint L and points M and N on it
What is ray LM and ray LN?
500
A quadrilateral that has exactly one pair of parallel sides
What is a trapezoid?
500
A polygon in which at least one vertex is pushed inward
What is nonconvex or concave?
500
Another name for a regular triangle
What is an equilateral triangle?
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