Point
A location with no size.
Public flashcard set
Geometry Essentials
Angles, shapes, and theorems vocabulary.
school math geometry
Flashcards
Line
Straight path extending infinitely in both directions.
Ray
Part of a line with one endpoint, extending infinitely one way.
Angle
Figure formed by two rays with a common endpoint.
Acute angle
Angle less than 90°.
Right angle
Angle of exactly 90°.
Obtuse angle
Angle between 90° and 180°.
Parallel lines
Lines in a plane that never meet.
Perpendicular
Lines that intersect at 90°.
Triangle
Polygon with three sides.
Quadrilateral
Polygon with four sides.
Circle
Set of points at fixed distance (radius) from a center.
Area
Measure of surface covered by a shape.
Perimeter
Distance around a 2D shape.