In the adjoining figure, ABC is a triangle in which ZB = 45° and ZC ='60°. If AD I BC and BC = 8 m, find the length of the altitude AD. Hint. In AABD, tan 45º AD BD 45° 60° B C D 1 = AD > 1 = BD = AD. BD AD In A ADC, tan 60º = DC > 13 = AD AD DC = DC 13 AD But BD + DC = BC = 8 m AD + 13 - = 8.
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