Geomentry Vocab.
Supplementry
2 angles = 180 degrees
Complementry
2 angles = 90 degrees
Collinear
3 or more points that lie in the same line
Coplanar
3 or more points that line in the plane but not as a straight line
Vertex
Common endpoints of the sides of an angle
Bi-conditional Statement
If and only if statement
Inverse
Negate both hypothesis and con.
Endpoint
Point at an end of a segment or starting point of a ray
Angle Bisector
Ray that divides an angle into 2 equal angles
Mojo
School spirit. Magic. Permain
Conjecture
Statement that is believed to be true
Inductive reasoning
Uses ex. to prove it is true general rule
Midpoint
a place where the point that divides a line segment into 2 equal sides
Line
an undefined term in Geometry is a line that has a straight path that has no thickness and goes on forever
Point
an undefined term in Geometry it names a location and has no sides
Adjacent
angles right next to each other
Compass
drawing instruments used to measure distances and draw circles
Counter Example
ex. proves conjecture or statement is false
Angle
formed by 2 rays with a common endpoint
Hypothesis
if part of a statement
Negate
insert not in statement
acute
less than 90 degrees
Segment Bisector
line, ray or segment that divides a line segment into 2 equal sides
obtuse
more than 90 degrees
Linear Pair
pair of adjacent angles whose noncommon sides are opposite rays
segment
part of a line consisting of two endpoints between them
Ray
part of a line that starts but extends forever in one direction
Deductive reasoning
process of using logic to draw con.
Side
rays are the sides of an angle
Theorem
statement has proven true
Conditional Statement
statement with if and then
Contrapostive
switch and negate hypothesis and con.
Converse
switch hypothesis and con.
Conclusion
the then part of a conditional statement
Protractor
tool used to find degree of angles
Plane
undefined it's a flat surface that has no thickness and goes on forever
Distance formula
used for finding the distance between two points