HW Week 11

Print out this page and cross off each section as you do it. About 50 problems

Videos for percent sections are up as of Thursday noon.

HW Part 1 of 4

STUDENTS— I MOVING THIS test corrections to next TUESDAY 12/12 DURING CLASS because I DID’T HAVE ALL YOUR TESTS IN ORDER TO GRADE AND RECORD THEM SO I COULDN’T GIVE THEM BACK! don’t worry about doing this ->(Correct errors on your Chp 1-3 Quiz….)

Chp 6.3 Using Cross Products to Solve Proportions Re-read pg 280-282. Do pg 283 PP # 20-26 evens

even answers: 20. d =9, 22. w =15, 24. x = 18, 26. t =30

Optional review videos:

• Intro to solving proportions with cross products Math Antics Proportions video (10 minutes)

• Word Problems with proportions. How to set up a proportions when reading word problems? Richard from AoPs sets up proportion (equal ratios are called proportions) (Note at minute 6 he “clears” the fraction by multiplying by 2 so he doesn’t have to have a fraction in the numerator.) He calls method 1 finding an equivalent ratio “scaling it up by a factor of _____”

McD 6.5 Similarity and Measurement

• Read pg 293-294. DO pg. 293-6 Try the check points #1 & 3 (1. 28 mm, 3. 26 2/3 ft or 26 ft 8 inches ), PP# 9, & 12 (a. 63, b) 15.75 ft or 15 ft 9 in)

• Optional review video (11 minutes) if you need more examples from Organic Chemistry Tutor

Triangle Geometry

• Watch Triangle classification video by Math Antics Take notes so you remember the material. Write it down, write it in your brain.

• Pythagorean Theorem: McD 9.3 p. 464 — read and do the investigation & draw conclusions section

Add the following formulas/facts to your IMPS (see McD 10.4 pge 528-229 for more info)

• Triangle has 180 degrees

• Acute triangle has 3 acute angles (all less than 90 degrees)

• right triangle has 1 right angle (one angle exactly 90 degrees)

• obtuse triangle has 1 obtuse angle (one angle greater than 90 degrees)

• equilateral triangle has 3 congruent angles 60-60-60 and 3 congruent sides

• isosceles triangle has at least two congruent sides

• scalene triangle has no congruent sides

• Pythagorean Theorem

• Add these formulas: Circumference of a circle = ∏D, Area of a circle = ∏r^2, Area of a rectangle = b x h or l x w (use a dot for multiply instead of x), Area of a triangle = 1/2 bh, Interest = PRT, Definitions of solids from pg. 535 (prism, cylinder, pyramid and cone, Percent equation a = p% x b (use a dot for multiply instead of x), Percent proportion a/b = p/100

HW Part 2 of 4

Geometry of Triangles

• Watch this math antics video on the Pythagorean Theorem: https://www.youtube.com/watch?v=WqhlG3Vakw8&t=268s

• Now read pg. 462-3 McD “Student Reference: Triangles and do Checkpoint 1-10 all (we’ll correct the evens in class— please remind me to do that.)

McD 7.1 Percents & Fractions…. Re-read pg. 329-330. Do pg 331-333 GP #3-7 odds, PP 11-17 odds, 25, 27

Optional video: Converting fractions to percents and vice versa Introduction to percent with Richard from AoPs converting fractions into percents and percents into fractions without a calculator

HW Part 3 of 4

McD 7.2 Percents and Proportions INTRODUCTION— we will be doing more of these so don’t panic if this takes a while to sink in.

Read pg 335-336. Then watch the video below. Then DO pg 337-339 PP#9-19 odds, 23 & 25

Watch this required video. Take notes. There are three basic types of percent problems - watch Richard of AoPs review how to solve these three basic problems.

• What is this percent of that? Example What is 30% of 120?

• What percent of this is that? What percent is 88 of 33?

• This is that percent of what number? 42 is 150% of what number?

Highly recommended but not required video that is REALLY good. Dr. Dan video #50 : How to translate the sentence into an equation https://www.youtube.com/watch?v=hYv63oei9Vo (28 minutes)

HW Part 4 of 4

McD 7.3 Percents to Decimals INTRODUCTION— we will be doing more of these so don’t panic if this takes a while to sink in.. Re-read the examples in this section. Do pg. 342-342 # 13, 17, 21, 25, 29

Highly recommended video by Dr. Dan video #51:  https://www.youtube.com/watch?v=50cCWoIKon8 (28 minutes)

Chp 6.3 Using Cross Products to Solve Proportions Do pg 283 PP # 33, 37-41 odds SQUARE 35

Preview: Watch this video on corresponding parts in congruent polygons- 9 minute video on corresponding parts in similar polygons: https://www.youtube.com/watch?v=aG7KcNNoe5I )

Correct work, redo missed problems as usual. Highlight problems on your HW sheet which you want to review in class