Idiot\'s Guides Basic Math and Pre-Algebra

CHAPTER 17 Geometry at Work ................................................................... In This Chapter How to use form ...

230 Part 3: The Shape of the World Let’s take a look at one of these more interesting problems. The figure shown here is a quadr ...

Chapter 17: Geometry at Work 231 Or you could add more lines to the figure. Connect X and Y, draw ZW, and extend it to meet XY a ...

232 Part 3: The Shape of the World WORLDLY WISDOM Taking the time to sketch out the portions of the figure before you begin calc ...

Chapter 17: Geometry at Work 233 CHECK POINT Find the shaded area in each figure. 2. 3. 4. 5. 3 3 3 3 7 7 6 20 1 1 12 5 11 2 ...

234 Part 3: The Shape of the World Similarity and Congruence ................................................................... ...

Chapter 17: Geometry at Work 235 Of course, that assumes that someone told you that the triangles were congruent. What if they a ...

236 Part 3: The Shape of the World Similar Triangles Triangles are similar if they are the same shape, but not necessarily the s ...

Chapter 17: Geometry at Work 237 'GUI will be similar to 'EDI if ’G # ’E and ’U # ’D. The third angles are the pair of vertical ...

238 Part 3: The Shape of the World If you know triangles are similar, you know angles are congruent and sides are in proportion. ...

Chapter 17: Geometry at Work 239 The river measures 60 meters from W to A. If you want to know if that big tree in your local pa ...

240 Part 3: The Shape of the World CHECK POINT Find the length of the specified segment. 16. 'GHI~'ARM, GH = 9 ft, GI = 8 ft, AR ...

Chapter 17: Geometry at Work 241 The ratio of the side opposite the 25r angle to the hypotenuse is the same in every right trian ...

242 Part 3: The Shape of the World CHECK POINT Tr ia n g le ABC has a right angle at ’B. AB = 12 cm, BC = 5 cm and AC = 13 cm. F ...

Chapter 17: Geometry at Work 243 Remember that tree you measured by using similar triangles? You needed the help of a friend to ...

244 Part 3: The Shape of the World CHECK POINT 'XYZ is a right triangle with right angle ’Y and hypotenuse XZ equal to 42 cm. I ...

PA RT 4 The State of the World Your great adventure in the world of numbers is almost over, at least for now. Hopefully, you’ve ...

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CHAPTER 18 Probability In This Chapter The basics of counting Permutations and combinations How to find the probabil- ity of an ...

248 Part 4: The State of the World Counting Methods ............................................................................ ...