Ms.haney Unit 1 Flashcards
What is an counter example?
Reason for why something is false
What is a conditional statement?
A statement combining two statements with “if…then…”
What is a converse
When the Hypothesis and conclusion of a conditional statement are switched
What is a inverse
When the Hypothesis and conclusion of a conditional statement are negated
What is a contrapositive
When the Hypothesis and conclusion of a conditional statement are switched AND negated
What is a biconditional
A statement that is formed from a conditional and its converse using “if and only if”
What is inductive reasoning
The ability to notice patterns and draw conclusions
What is a conjecture?
A conclusion reached by inductive reasoning
What is deductive reasoning
Using facts, rules and logic to make conclusions
What is a postulate/axiom?
It is a statement that is accepted as true without proof
What is a point
Symbol • point UPPER CASE LETTER No length width
What is a line
two letter (with line on top) infinite length and width
What is a line segment
•————• two uppercase letter and a line on top with no arrows has a length
What is a ray?
•—————> two upper case letter with line on top and one arrow the first letter is always at the point to the arrow
What’re Collinear points?
Points on the same line
What are coplanar points or lines
Points on the same plane
What is partition property?
Line AC= line AB+ line BC
What is a midpoint
A part of a line segment that divides the segments into 2 congruent segments
What are bisectors?
Any line or subset of a line that intersects the line segment at its midpoint
Acute angle
Less than 90
Obtuse
Less than 180
Right angle
90
Straight angle
180
Reflex angle
Outside angles
What are Angle bisectors
A ray or line segment is an angle bisectors if and only if it divides the angle into two congruent angle or two equal halves
Perpendicular lines
Two rat, lines or segments which intersect to form right angles
What’re adjacent angles?
Angles if and only if they share a vertex and a side and do not overlap
Complementary angle
Add up to 90
Supplementary
Add up to 180
Linear pair
Supplement angles that add up to 180
Vertical angles
Two non adjacent sides formed by intersecting lines or segments
What is parallel postulate
Through a given point not on a given line, there exists one and only one line parallel to the given lines
Transversal
A line that intersects two other lines in two different parts
