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Geo Vocab

TermDefinition
acute angle an angle less then 90 degrees
adjacent angles two angles in the same plane with a common vertex and a common side, but no common interior points.
angle a figure formed by two rays, or sides, with a common endpoint
angle additon two angles add into one whole angle. You can sum their measures
angle bisector the line segment, line, or ray that bisects an angle
bisect divides in half
collinear Points that lie on the same line
complementary angles angles that add up to 90 degrees
conclusion the part q of a conditional statement following the word then.
conditional statement a statement that can be written in the form "if p, then q."
congruent angles angles that have the same measures
congruent segments segments that have the same length
conjecture A statement you believe to be true based on inductive reasoning
construction a way of creating a figure that is more precise
contrapositive the statement formed by both exchanging and negating the hypothesis and conclusion.
converse he statement formed by exchanging the hypothesis and conclusion.
coordinate A point corresponds to one and only one number on the ruler
coordinate plane a plane that is divided into four regions by a horizontal line (x-axis) and a vertical line (y-axis)
coplanar Points that lie in the same plane
counterexample To show that a conjecture is false, you have to find only one example in which the conjecture is not true. This case is called a.....
Deductive reasoning building a logical argument/explanation by making conjecture based on established facts
degree 1 out of 360 of a circle
distance the absolute value of the difference
of the coordinates
endpoint a point at one end of a segment or the starting point of a ray.
exterior of an angle the set of all points outside the angle.
hypotenuse the side that stretches from one leg to the other
hypothesis the part p of a conditional statement following the word if.
inductive reasoning process of reasoning that a rule or statement is true because specific cases are true
interior of an angle The set of all points between the sides of the angle
inverse the statement formed by negating the hypothesis and the conclusion.
Law of detachment if P -> q is a true conditional and p is true, then q is true
Law of syllogism If p -> q and q-> r are true conditionals, then p -> r are also true..
leg two sides that form a right angle
length distance between A and B ̶̶
line a straight path that has no thickness and extends forever.
linear pair a pair of adjacent angles whose noncommon sides are opposite rays
logically equivalent statements Related conditional statements that have the same truth value
measure usually given in degrees.
midpoint the point that bisects the segment into two congruent segments. the center point
negation p is "not p," written as ∼p
obtuse angle an angle more then 90 degrees
opposite rays two rays that have a common endpoint and form a line.
plane a flat surface that has no thickness and extends forever.
point a location and has no size. It is represented by a dot.
postulate or axiom, is a statement that is accepted as true without proof.
ray a part of a line that starts at an endpoint and extends forever in one direction.
right angle a 90 degree angle
segment the part of a line consisting of two points and all points between them.
segment bisector any ray, segment, or line that intersects a segment at its midpoint. It divides a segment into two equal parts at its midpoint.
straight angle a 180 degree angle
supplementary angles angles that add up to 180 degrees
undefined terms cannot be defined by using other figures.
vertex common endpoint
vertical angles two nonadjacent angles formed by two intersecting lines. opposite angles
Created by: tricia.solinski
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