Best Answer

Does length CD touch side AB at a right angle?

If so, from pythagoras...

(CA)sq = (CD)sq x (0.5x(AB))sq

so...

CD=sqrt[(CA)sq / (0.5x(AB))sq]

sq = squared

sqrt = square-root

put all your known numbers in the bold equation

Q: Triangle ABC is an equilateral triangle What is the length of CD Give your answer to the nearest whole number?

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