Arithmetic Volume 3

Arithmetic Volume 3

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1905 edition. Excerpt: ...at $1.33 a yard? 14. A Washington lumber mill cuts 87 thousand feet of lumber every 10 hours; how many feet will it cut in 26 days of 10 hours each? If an ordinary 10-room house requires 7 thousand feet of lumber, how many such houses will one day's product build? 15. Some orange groves net their owners $875 an acre; at this rate what is the profit on 55-acres? 16. The value of the furniture manufactured annually iv. this country is $80,000,000. There are about 1,500 factories; what is the average output for each factory? FORM STUDY AND MEASUREMENT ANGLES Instruments: Rule, protractor and compasses 1. Lay the compasses down flat, as shown in the picture. The two arms form an angle. Move one arm of the compasses from one position to another. How is the size of the angle changed? Does the change depend upon the length of the arms of the compasses? 2. Draw two lines forming an angle. 3. Draw three lines forming two angles arranged as in Figure 1. If the angles are 20 and 25, what is their sum? 4. Draw two other angles; measure them with a protractor and find their sum. 5. Two angles, as A and B of Figure 2, are 65 and 50. The equation A-B = C means that C is the difference between A and B. How many degrees in C? 6. Draw a figure like that shown, but larger. Measure the angles A and B. Find C. Verify by measurement. Draw the following angles with the protractor, then construct the sum of each pair; the difference between each pair: 7. 85, 25. 8. 50, 20. 9. 120, 60. 10. 80, 45. 11. 70, 55. 12. 130, 10. Fig. 2. 1. Draw a straight line 2 in. long. Place the points of the compasses at its end points. Transfer the points of the compasses to another position. How far apart are the new points?.., .-" 2. Place the points of the compasses...show more

Product details

  • Paperback | 58 pages
  • 189 x 246 x 3mm | 122g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236960394
  • 9781236960399