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Geometry Terms

line A continuous extent of length.
line segment One part of a line.
ray The part of a straight line considered as originating at a point on the line and as extending in one direction from that point.
vertex The intersection point of two sides of a plane figure.
point A position in space.
obtuse angle An angle greater than 90 degrees but less than 180 degrees.
acute angle An angle less than 90 degrees but greater than 0 degrees.
right angle A 90 degree angle
perpendicular line segments Two line segments which cross to form 90 degree angles.
parallel line segments Line segments that do not intersect.
equilateral triangle A triangle with all sides equal and all angles equal.
isosceles triangle A triangle which has two sides equal.
scalene triangle A triangle having three unequal sides and angles.
intersecting line segments Line segments that cross each other.
chord The line segment between two points on a given curve.
radius A straight line extending from the center of a circle or sphere to the circumference or surface.
diameter A straight line passing through the center of a circle or sphere and meeting the circumference or surface at each end.
circle A closed plane curve consisting of all points at a given distance from a point within it called the center.
parallelogram A quadrilateral having both pairs of opposite sides parallel to each other
quadrilateral A polygon with four sides
Created by: mlm1045