SETS
A well-defined collection of items/objects.
SET
Consider A = {B,E,S,T}. Name a SUBSET
Answers will vary
Teacher can decide
A= {All students in the TRA Geometry Class 2024}
Is Mrs. Darnell a member of this set?
NO. She is not a student.
What symbol do we use to indicate Intersection of sets?
∩
The point where the 2 rays come together in an angle is called the _______________
VERTEX
Which of the following sets are well-defined?
A. The set of all large numbers
B.The set of beautiful lady
C. The set of all boys in Grade 7 in LEMS.
C. The set of all boys in Grade 7 in LEMS.
True or False: B is a subset of A
A = {Ram, Jay, Mick}.
B.{Andy, Ram, Ed, Jay}
FALSE
Given that S = {All residents of Sanford, FL. }
and L = {All students at TRA.}
True or False:
L is a subset of S.
NO. Not ALL students live in Sanford.
A = {1,3,5,7}
B = {1,2,3,4}
What is the A ∪ B?
A ∪ B = {1,2,3,4,5,7}
COMBINING THE ELEMENTS OF SET A AND SET B.
What do we use to measure an angle?
A Protractor
List all the elements in A = (letters in the word “BOOK”}.
A.A = { O,O}
B.A = {B,O,O,K}
C.A = {B,O,K}
C.A = {B,O,K}
A set with no elements is represented by_____
It can also be said that the set has NO MEMBERS
∅ or by {}
Given Line X______________Y
Are the points on the line in between X and Y MEMBERS of Line XY?
Yes. They are all points on the line even if they are not named.
A = {2, 4, 6, 8}. B = {3, 4, 5, 6, 7, 8, 9}
Find A ∩ B
The intersection (what they have in common)
{4, 6, 8}
An angle whose measure is less than 90 degrees.
An ACUTE angle
Write {even whole numbers between 3 to 15} using the roster (LIST) method.
A.{4,6,8,10,12,14}
B.{5,7,9,11,13}
C.{2,4,6,8,10,12,14,16}
A.{4,6,8,10,12,14}
Every member of set A is also a member of set B, then set A is said to be a_________
Subset of Set B
Given Set M = { all the books of the Bible}
Name a MEMBER of this set.
Any of the 66 books of the Bible will be correct.
The teacher will determine if the answer is correct.
G = {All the students in 9th grade}
H= {All the students in 12th grade}
Find G ∩ H
∅ null set or {}empty set
They do not have any students in common.
An angle that is greater than 90 degrees but less than 180 degrees.
An OBTUSE angle
Describe this set in words: {2,3,5,7,11,13,17,19}.
A.Set of whole numbers less than 20
B.Set of prime numbers from 2 to 19
C.Set of odd numbers less than 20
B. Set of prime numbers from 2 to 19
What is the WORD denoted by capital letter U that means ALL the members of both sets.
UNION OR UNIVERSAL SET
6(5+7)+9
81
Set P = { x, y, z} Set G = { 1, 2, 3}
Find P ∪ G
{x, y, z, 1, 2, 3}
Union is the joining of every member from both sets.
What do we call the location where 2 lines intersect?
A POINT