Geomentry Vocab.

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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


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