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Chapter 8: Q.23 (page 553)
Find the area of each triangle.
The required area of the triangle is
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Area of a Segment Find the area of the segment of a circle whose radius is 5 inches, formed by a central angle of .
Crankshafts on Cars On a certain automobile, the crankshaft is 3 inches long and the connecting rod is 9 inches long (see the figure). At the time when OPQ is 15°, how
far is the piston (P) from the center (O) of the crankshaft?
The Original Ferris Wheel George Washington Gale Ferris, Jr., designed the original Ferris wheel for the 1893 World’s Columbian Exposition in Chicago, Illinois. The wheel had 36 equally spaced cars each the size of a school bus. The distance between adjacent cars was approximately 22 feet. Determine the diameter of the wheel to the nearest
foot.
Finding the Height of an Airplane An aircraft is spotted by two observers who are 1000 feet apart. As the airplane passes over the line joining them, each observer takes a
sighting of the angle of elevation to the plane, as indicated in the figure. How high is the airplane?
Rework Problem 7 under the same conditions except that, at time t = 0, the object is at its resting position and moving down.
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