Test 1

Question 1

Point

Answer 1

An exact location, marked by a dot. Signified by a capital letter.

Question 2

Line

Answer 2

Set of (two) points that extend forever in opposite directions. Every line has an infinite number of points.

Question 3

Colinear

Answer 3

On the same line

Question 4

Non-collinear

Answer 4

Not on the same line… (duh)

Question 5

Segment

Answer 5

Part of line with an exact length

Question 6

Ray

Answer 6

Part of a line that starts at a point & goes forever in one direction.

Question 7

Midpoint

Answer 7

Exact middle of two other points - can only be a midpoint if the two segments are equal. Must be colinear.

Question 8

Opposite rays

Answer 8

Fancy term for a line - start at the same point, go in opposite directions.

Question 9

Intersect

Answer 9

Connect, cross, something in common.

Question 10

Plane

Answer 10

a flat surface with infinite length and width, no depth. Defined by 3 noncollinear points, or a capital letter.

Question 11

Coplanar points

Answer 11

On the same plane

Question 12

Noncoplanar

Answer 12

boy I sure wonder what this means >_<….

Points that are not on the same plane.

Question 13

Between

Answer 13

A point that is between two others - NOT THE MIDPOINT.

Question 14

Segment + Angle Addition Postulate

Answer 14

Sum of parts is equal to the whole.

Question 15

Distance

Answer 15

Length between two points, cannot be negative.

Question 16

Distance formula

Answer 16

d = square root of (x1-x2) squared + (y1-y2) squared

Question 17

Midpoint formula

Answer 17

(x1+x2/2), (y1+y2/2)

Question 18

Acute

Answer 18

Less than 90 degrees.

Question 19

Obtuse

Answer 19

More than 90 degrees

Question 20

Right angle

Answer 20

exactly 90 degrees

Question 21

Straight angle

Answer 21

Exactly 180 degrees

(can also be called a line, or opposite rays)

Question 22

Naming an angle

Answer 22

Using the symbol, by the named points (point, vertex, point), by the vertex only, by a number inside of the angle.

Question 23

Adjacent Angles

Answer 23

Share a side / ray

Question 24

Angle Bisector

Answer 24

Cutting the angle in two, EQUALLY. Cannot be a bisector if not equal.

Question 25

Perpendicular

Answer 25

One thing insectering another at 90 degrees. An upside down T is the symbol.

Question 26

Complementary Angles (complements)

Answer 26

Angles that add up to 90 degrees

Question 27

Supplementary Angles (supplements)

Answer 27

Angles that add up to 180 degrees

Question 28

Linear Pairs

Answer 28

Adjacent and supplementary angles.

Question 29

Counterexample

Answer 29

One specific example where the statement is false, usually resulting from flipping the if/then statement

Question 30

Proof

Answer 30

A list of steps written in Statement / Reason to show something is true

Question 31

Vertical Angles

Answer 31

Angles formed by two intersecting lines and are directly across from one another - ALWAYS EQUAL

Question 32

Reflexive Property

Answer 32

For every a, a = a. X = X, etc. Anything equal to itself equals itself.

Question 33

Symmetric

Answer 33

For all numbers a and b, if a = b, then b = a.

Question 34

Transitive

Answer 34

For all numbers a, b, and c, if a = b, and b = c, then a = c.

Question 35

Addition and Subtraction

Answer 35

For all numbers, a, b, and c, if a = b, Then a + c = b + c and a - c = b - c

Question 36

Multiplication and Division

Answer 36

For all numbers a, b, and c, if a = b Then ac = bc, and if c does not equal 0, a/c = b/c

Question 37

Substitution Property

Answer 37

For all numbers a and b, if a = b, then a may be replaced by b in any equation or expression

Question 38

Distributive

Answer 38

For all numbers a, b, and c, a(b+c) = ab + ac

Question 39

Vertical Angle Theorem

Answer 39

Vertical angles are equal

Question 40

Congruent Compliment Theorem

Answer 40

if two angles are complementary to the same angle (or congruent angles), they are congruent to each other.

Question 41

Congruent Supplement Theorem

Answer 41

If two angles are supplementary to the same angle (or congruent angles), they are congruent to each other.

Question 42

Compliment Angle Theorem

Answer 42

Two compliment angles = 90

Question 43

Supplementary angle theorem

Answer 43

Two supplements = 180

Question 44

Right angle theorem

Answer 44

Right angle = 90