Geometry Flashcards
Name a location and has no size
A point
Is a straight path that has no thickness and extends forever
Line
Any set of points that lie on the same line
Collinear points
Points do not lie on the same line
On collinear points
Is a flat surface that has no thickness and extends forever
Plane
Is the point or set of points in which two figures meet
Intersection
Two geometric objects that have the same size and shape
Congruent
Shows that two segments are congruent
Congruence statement
Is part of a line that starts at an endpoint and extends infinitely in one direction
Ray
Two rays that have a common endpoint and form a line are
Opposite rays
Is a figure for me by two rays with a common endpoint
Angle
Common endpoint is the angles
Vertex
Measures greater than 0 degree and less then 90 degree
Acute angle
Measure grater than 90degrees less then 180
Obtuse
If two lin s in a pale are perpendicular to the same line, then they are
Parallel
Nonajacent angles formed by two intersecting lines
Vertical angles
If two angle s are vertical angle, they are
Congruent
Is a statement that is believed to be true
Conjecture
An example that does not support the conjecture
Counterexample
Distance formula
D =v————-
(X2-X1)2+(y2+y1)2
The hypthothesis is true, but conclusion is false then Its truth statement is
False
Is a line that intersects two or more Coplanar lines at different points
Transversal
Midpoint formulas
M (x1+x2, y1+y2)
2 2
Area of triangle
Bh divided by 2
