Chapter 9 – Math 3 – Ms. Doherty
Problem Set Problems:
9.1: #6d, 11
9.2: #14, 15
9.3: #21
9.4: #24
9.5: #14
9.6: #16
9.7: #25
9.9: #22
9.10: #21a, b
Remember to work on problem sets as
they are assigned. You must have work
for each problem set problem each
night. HW will be checked daily.
Grading HW:
Day it’s Due:
Up to an A+
1 Day Late:
Up to a C2 Days Late:
Up to an F
More than 3 days: No Credit
Lesson 1 - Circles – 9.2 Introduction to Circles
 Review of Circles, Definition and properties
 Finding circumference and area
 Finding arc measure and arc length
 Finding areas of sectors
Handouts: Circle packet (F block)
HW: F Block: Do circled problems in Packet and pg.374: 14, 15 (pset)
E and B Block: pg.374: 2, 4, 5-10, 14-16
Lesson 2 - 9.1 – Reducing Radicals
 WU & Check HW 9.2
 Simplifying radicals by recognizing perfect squares
 Introduction to simple factor (a = 1)
Handouts: Notes Packet
HW: pg. 368: 1-6
Lesson 3 - 9.1 and Factoring
 WU & Check HW 9.1
 Learn to Factor quadratics where a = 1
 Learn to Factor quadratics where a ≠ 1
 Introduction to online factoring game
Handouts: Factoring handout, sign in reminder for MangaHigh, HW factoring worksheet
HW: Factoring Worksheet, Assigned achievement on MangaHigh
Lesson 4 - 9.3 Altitude on Hypotenuse Thm
 WU & Check HW Factoring
 Proving the triangles similar
 Looking at the ratios of the sides and creating guidelines for solving their lengths
 Practice finding lengths of sides
Handouts: Notes Packet
HW: pg.379: 1-5
Lesson 5 - 9.3 Altitude on Hypotenuse Thm Continued
 WU & Check HW 9.3.1
 Recognizing Altitude on Hypotenuse
 Finding side lengths with pieces missing
 Practice!
Handouts: None
HW: pg. 380: 12, 13, 14, 15, 16, 17, 21
Lesson 6 - 9.4 Pythagorean Theorem
 WU & Check HW 9.3.2
 Discuss the statement of the Pythagorean Thm
 Find 3 proofs of the Pythagorean theorem
 Write up a proof of the Pythagorean Theorem in your own words
 Find a few facts about Pythagoras and the Pythagoreans
Handouts: In class Pythagorean Thm assignment, Rubric for Proof of PT
HW: pg. 388: 9, 12, 14, 17, 18, 24, Finish Pythagorean proof if unfinished in class
Lesson 7 - 9.6 Pythagorean Triples, Families of Right Triangles
 WU & Check HW 9.4, Collect Pythagorean Proof
 Recognize groups of whole numbers that satisfy the Pythagorean theorem
 Using the Pythagorean theorem with triangles with large numbers
Handouts: Notes Packet
HW: pg. 401 (5, 6, 8 – 10, 12, 13, 15, 16)
Lesson 8 - 9.5 Distance Formula
 WU & Check HW 9.6
 Derive the distance formula using the Pythagorean theorem
 Use the distance formula to find lengths in a coordinate plane
Handouts: Notes Packet
HW: pg. 394 (1, 5 – 7, 14, 17, 18, 21)
Lesson 9 - 9.7 Special Right Triangles
 WU & Check HW 9.5
 Identify ratio of side lengths in a 30-60-90 triangle
 Identify ratio of side lengths in a 45-45-90 triangle
 Use ratios to solve for side lengths
Handouts: Notes Packet
HW: pg. 408 (1 – 4ac, 5, 7, 10, 15 – 18, 22, 25)
Lesson 10 - 9.9 Introduction to Trigonometry
 WU & Check HW 9.7
 Look at the ratios of the sides of similar triangles
 Introduction to sine, cosine, and tangent
Handouts: Notes Packet
HW: pg. 421 (7, 9, 12 – 16, 22)
Lesson 11 - 9.10 Trigonometric Ratios
 WU & Check HW 9.9
 Use trigonometric ratios to solve right triangles
 Using the calculator to find trig values
Handouts: Trig Table
HW: pg. 426 (5, 6, 10, 11, 13, 15, 21ab)
Lesson 12 - Trigonometry Reviewed
 WU & Check HW 9.10
 In Class group work on trig, especially word problems
 Answer questions on problem set
Handouts: In class Trig Work
HW: Finish Ch. 9 problem set
Lesson 13 - Grade Problem Set
 Take out problem set and grade from rubric
 Collect Problem Set
 If we finish, begin work on review
Handouts: Review Packet
HW: Work on review packet
Lesson 14 - Review for Chapter 9 Test
 In class review for Test
Handouts: None
HW: Study for Test, complete review packet
Lesson 15 - Chapter 9 Test