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In triangle ABC, AB = 17, AC = 8, and BC = 20. Let D be the foot of the altitude from C to AB. Find the area of triangle ACD.

 Jan 2, 2021
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1/   Using the law of cosines find angle A.

 

2/   Using angle A and side AC, calculate sides AD and CD

 

3/   [ACD] = 1/2(AD * CD)

 Jan 2, 2021

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