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## Monday, January 9 th

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**Warm Up**Monday, January 9th Find the missing value in each pair of similar shapes 1. 2. x 5 10 3 Please complete the warm up and write down your homework x 2 6 4**Corny Joke of the Day**Why did the teacher have to wear sunglasses to school? Her students were too BRIGHT**What? Checkpoint #1**Similar figures Indirect measurement When? TODAYYYYYYYY**Week Schedule**• Monday: Scale Drawings NOTES HW Scale Drawing Worksheet/Weekly Review • Tuesday: Class PROJECT HW STUDY GUIDE • Wednesday: Revie HW STUDY • Thursday: Test HW NONE • Friday: WEEKLY REVIEW DUE, Test Corrections, Translations NOTES HW NONE**Weekly Review**Due Friday! Remember to show your work on a separate sheet of paper **A and B are similar.**Find y B. What Did Tiggerdo wrong? A. 14 7 4 x**Flashcards**Indirect measurement**What is It?**Indirect Measurement uses similar figures and proportions to find height of objects you cannot measure directly**Checkpoint**• Please put your name on it • Make sure to READ each question carefully • Be sure to show your work • Put in front bin when finished • Complete Weekly Review**Attention!**Pezzino Travel Company needs your help! They need some expert map readers to find distances between famous landmarks**Buzz word #1**The map shown is a scale drawing. A scale drawingis a drawing of a real object that is proportionally smaller or larger than the real object. In other words, measurements on a scale drawing are in proportion to the measurements of the real object.**Buzz word #2**A scale is a ratio between two sets of measurements. In the map above, the scale is 1 in:100 mi. This ratio means that 1 inch on the map represents 100 miles.**Setting it up**Set up a proportion: ratio equals ratio Ratio #1 is the scale factor they give you (first 2 numbers) Ratio #2 place third number according to measurement Measurements match in numerators Measurements math in denominators**Is it set up right?Why or why not?**1. The scale on the map is 3 cm: 10 m. On the map the distance between two cities is 40 cm. What is the actual distance? 2. The scale on the map is 10 in: 50. On the map the distance between two schools is 30 in. What is the actual distance?**Problem #1**Let’s Try Together!**20 in.**4 in. 4x 20 _____ ____ ___ ___ 1 mi 4 4 x mi The scale on a map is 4 in: 1 mi. On the map, the distance between two towns is 20 in. What is the actual distance? Write a proportion using the scale. Let x be the actual number of miles between the two towns. = 1 • 20= 4 •x The cross products are equal. 20= 4x x is multiplied by 4. = Divide both sides by 4 to undo multiplication. 5 = x 5 miles**Problem #2**Let’s Try Together!**18 in.**3x 3 in. 18 ___ ___ ____ _____ 1 mi 3 x mi 3 The scale on a map is 3 in: 1 mi. On the map, the distance between two cities is 18 in. What is the actual distance? Write a proportion using the scale. Let x be the actual number of miles between the two cities. = 1 • 18= 3 •x The cross products are equal. 18= 3x x is multiplied by 3. = Divide both sides by 3 to undo multiplication. 6 = x 6 miles**Problem #3**You Try!**The scale on a map is 2 in: 50 mi. On the map, the distance**between two lakes is 12 in. What is the actual distance?**Problem #4**Astronomy**18.3 in.**1 in. _________ ___________ x million km 30 million km If a drawing of the planets was made using the scale 1 in:30 million km, the distance from Mars to Jupiter on the drawing would be about 18.3 in. What is the actual distance between Mars to Jupiter? Write a proportion. Let x be the actual distance from Mars to Jupiter. = The cross products are equal. 30 • 18.3= 1 •x 549 = x The actual distance from Mars to Jupiter is about 549 million km.**Problem #5**Rafting**Our class decides to go white-water rafting on the river.**The map we have of the river has a scale of 3 inches equals 10 miles. On the map, the distance between their start point and end point is 18 inches. What is the actual distance in miles? Write a proportion. Let x be the actual distance between start to end Solve for x**Can you Answer the EQ?**Double time 2 minutes to answer it 2 minutes to share with elbow partner 2 minute discuss with class