Module 1 Flashcards
Line segment
a portion of a line with two endpoints.
Ray
part of a line that has one endpoint and continues in one direction infinitely
Angle
two noncollinear rays with a common endpoint; formed when two lines intersect
Vertex
the common endpoint of two rays; points on polygons
Circle
a set of all points in a plane that are a given distance from a point, the center
Parallel Lines
two lines that lie within the same plane and never intersect
Perpendicular Lines
two lines that intersect at 90° angles
Theorems
accepted as facts
Postulates
seem true but must be proven
Pythagorean Theorem
In a right triangle the sum of the square of the legs of the triangle are equal to the square of the hypotenuse a² + b² = c²