Welcome’Geometry! - Welcome to Mrs. Carucci's...
Transcript of Welcome’Geometry! - Welcome to Mrs. Carucci's...
Welcome Geometry! NO SB TODAY J
Homework: HW#8 Pg. 49 #18, 20-‐21 U1Q1 Corrections Note Check #1 due Friday
Updates: U1Q2 will be Friday (Act. 1-‐4)
Agenda ① Note Check Announcement ② Warm-‐Up! ③ Review HW#7 ④ Finish U1A4 (4-‐2) ⑤ Review U1Q1 ⑥ Around the World ⑦ U1A5 (5-‐1) ⑧ Cool-‐Down!
Warm-‐Up! (1) Suppose P is between M and N. If PM = 2x – 5, PN = 6x,
and MN = 5x + 4, what is the value of x?
(2) ∠D and ∠E are complementary. If m∠D = 5x + 3 and m∠E = 3x – 1, what is x?
(3) List all that you know about the Pythagorean Theorem.
HW#7 Pg. 49 #1-‐3, 6-‐10, 12, 14-‐19, 20 (1) B (2) B (3) A (6) 20 (7) -‐2 (8) -‐7
(9) 3 (10) 24 or -‐8 (12) Postulate is a statement that is assumed without proof. Theorem has been proven true. (14) (a) 5 (b) 12 (c) 24 (d) 12 (15) 2.5 km
(16) 32 (17) B (19) C
By the end of this period you will be able to: (1) Find the measure of angles. (2) Derive and use the distance formula to lind the distance
between two points on a coordinate plane.
Learning Objectives
U1A4 (4-‐2) There are times when we will have angles with the same shape and size. What do you predict these types of angles are called? Congruent Angles o Angles that have the same measure. o Angles that have the same size and same shape. o Arc tic marks are used to show that angles are congruent. ∠ABC ≅ ∠DEF.
U1A4 (4-‐2) You will commonly see m∠ABC = m∠DEF which denotes that the angles have the same measure. Note – congruence demonstrates same size and shape while an equal sign denotes actual numbers are involved, hence measurement. We will do (5a) together than you will do (5b-‐5c).
U1A4 (4-‐2) What do you picture an angle bisector to be? Angle Bisector o A ray that divides an angle into two congruent angles. o JK bisects ∠LJM; thus ∠LJK ≅ ∠KJM.
U1Q1 When you get back your quiz you will begin to make corrections in a different colored pen. I will give you 5 minutes to make corrections by talking with the people at your table or asking a Peer Expert or ME. Peer Experts are students whom did very well on the quiz and they will circulate table to table asking if you need help.
U1Q1 1st Period Peer Experts: Sophie, Alyssa, and Bella
4th Period Peer Experts: Alexi and Georgia
6th Period Peer Experts: Jennie, Athena, Sam H., and Tanveen
You will get a grade for correct corrections!
Around the World Open up your classwork notebook to the next page and title the left hand side Around the World. Friday is your quiz hence I want to make sure you are ready for the type of questions I will be asking.
Around the World I have posted around the room 6 questions on pink paper. You will go the question closest to your desks and copy down the problem into your notebook. Then you will answer the question. Once you get a solution you will go look around at the other pink papers and at the bottom of one of the papers should be your solution. That is the next problem you will attempt. If you are successful, you should go to each question and end up at the question you started at.
Around the World You may work with others, but if you are standing instead of talking you will owe me time after class.
This is practice time NOT talk time.
This is your chance to ask me or others specilic questions on what you did wrong such that you can do well on your quiz Friday J
U1A5 (5-‐1) In the last lesson you were using the idea of number lines to lind a distance. This is 1-‐dimensional. Now, we are going to use a 2-‐dimensional system to lind distance. A coordinate plane. Attempt Practice (1) in your groups.
U1A5 (5-‐1) Distance Formula o The distance, d, between two points (x1, y1) and (x2, y2) is:
When using the distance formula life can get tricky
because now we have square roots!
As a class lets simplify