Msth Flashcards
Reflection
A transformation across a line, called the line of reflection, such that all points of preimage and all points of image are equidistant to line of reflection.
Ray
A part of a line that starts at an endpoint and extends forever in one direction
Radius of a circle
A segment whose endpoints are
the center of a circle and a point on the circle, the distance from the center of a circle to any point on the circle.
Preimage
The original figure in a transformation
Postulate
A statement that is accepted as true without proof. Also called an Axiom.
An undefined term in geometry, it names a location and has no size.
Point
Plane
An undefined term in geometry, it is a flat surface that has no thickness and extends forever.
Pi
The ratio of the circumference of a circle to its diameter.
Perimeter
The sum of the side lengths of a closed plane figure.
Two rays that have a common endpoint and form a line.
Opposite rays
