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OpenStudy (anonymous):
The altitude of an equilateral triangle is 10. What is the length of each side?
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OpenStudy (bahrom7893):
a|dw:1332122913069:dw|
OpenStudy (anonymous):
A. 20 sqrt 3 B. 10 sqrt 3 C. 20 sqrt 3/3 D. 10 sqrt 3/3
OpenStudy (bahrom7893):
using pythagorean thm: a^2=a^2/4+100
OpenStudy (bahrom7893):
a^2-a^2/4=100 3a^2/4=100 3a^2=400
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