Geometry: An Interactive Journey to Mastery

Lesson 17: Trigonometry through Right Triangles

8. Compute the value of the length wͼ௘6HHFigure 17.13௘ͽ


9. 7KHDQJOHRIGHSUHVVLRQIURPWKHWRSRIRQHEXLOGLQJWRWKH¿UVWÀRRU
   window of a neighboring building 100 feet away is 33° and to a
   VHFRQGÀRRUZLQGRZLVƒ7RWZRGHFLPDOSODFHVZKDWLVWKHYHUWLFDO
   distance between the two windows?


10. -DNHVWDQGVLQD¿HOGDQGREVHUYHVDELUGWRKLVQRUWKDWDQDQJOHRIHOHYDWLRQRIƒ$IWHUPLQXWHVWKH
    ELUGLVWRKLVVRXWKDWDQDQJOHRIHOHYDWLRQRIƒ$VVXPLQJWKDWWKHELUGÀHZLQDVWUDLJKWSDWKGLUHFWO\
    RYHU-DNH¶VKHDGDWDFRQVWDQWKHLJKWRIIHHWDQGDWFRQVWDQWVSHHG¿QGWKHVSHHGRIWKHELUG

5 20 w^15

Figure 17.13