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Geometry Today: 8.1 Check 8.2 Instruction 8.2 Practice I submit to you that if a man hasn’t discovered something he will die for he isn’t fit to live.

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Presentation on theme: "Geometry Today: 8.1 Check 8.2 Instruction 8.2 Practice I submit to you that if a man hasn’t discovered something he will die for he isn’t fit to live."— Presentation transcript:

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2 Geometry Today: 8.1 Check 8.2 Instruction 8.2 Practice I submit to you that if a man hasn’t discovered something he will die for he isn’t fit to live. Martin Luther King

3 Yesterday Assignment: 8.1 p 462 #29, 31, 46-50, Quiz Tuesday I submit to you that if a man hasn’t discovered something he will die for he isn’t fit to live. Martin Luther King

4 Homework Quiz Take out a piece of notebook paper label it CHAPTER 8 HOMEWORK QUIZ. Write down the date (1/9), then write out p 462 #47 (INCLUDING PICTURE!!!), your work and your answer.

5 8.2 Problem Solving in Geometry with Proportions Objectives: 1.Find the geometric mean of two numbers 2.Use properties of proportions 3.Use properties of proportions in real life Vocabulary: geometric mean

6 X is the geometric mean of a and b The mean (x) always appears twice. Find the geometric mean of 8 and 18. x = 12 Geometric Mean: extremes means 8.2 a b

7 Find the geometric mean of 5 and 75. WRITE X TWICE! x 2 =

8 No-No’s of Radicals 1. No decimals 2. No perfect squares in radicals 3. No fractions in radicals 4. No radicals in the denominator

9 Find the geometric mean of 5 and 75. WRITE X TWICE! x 2 = 375 Find the geometric mean of and. X = 4 Find the geometric mean of 30 and

10 A scale model of a car is 10 inches long and 5 inches tall. The actual car is 3 feet tall. What is the length of the actual car? Real Life 8.16’ Long vs Tall Model ____ ____ Actual

11 A map has a scale ratio of 2” : 25 miles. If the distance between to cities is 3.5” on the map, how far is it in real life? miles Real Life 8.1

12 Students wanted to make a statue honoring Mr. Pelzer. The model of the statue is shown below. The model’s height is 18” and the base is 5”. If the real base is 12’, how tall is the statue? h = 43.2’ If the statue’s calculator is 3’, how large is the model’s one? h = 1.25” 8.2

13 You are building a scale model of your uncles’ fishing boat. The boat is 62 ft long and 23 ft wide. The model will be 14 in long. How wide should it be? h = 5.2 in The mast of your uncles fishing boat is 30 ft tall. How tall should the mast be on the model? h = 6.8 in 8.2

14 Assignment: 8.2 p468 #18, 20, 22, 31-32, Quiz Tuesday Geometry I submit to you that if a man hasn’t discovered something he will die for he isn’t fit to live. Martin Luther King


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