SOLUTION: Triangle ABC is an equilateral triangle. AD=10 What is the length of CD? Give your answer to the nearest whole number. (LINK IS TO DIAGRAM OF TRIANGLE) http://www.mrlarkins.

Question 472293: Triangle ABC is an equilateral triangle.
AD=10
What is the length of CD? Give your answer to the nearest whole number.
(LINK IS TO DIAGRAM OF TRIANGLE)
http://www.mrlarkins.com/geometry/InteractiveTextbook/Ch08/08-04/images/Ch08_Sec04_im009.gif

Answer by sudhanshu_kmr(1152) (Show Source): You can put this solution on YOUR website!

Length of DB= 10
length of CB = 20
using Pythagoras theorem ...
CD = sqrt(20^2 - 10^2)
= sqrt (300)
= 10 (root 3)
= 17.32 (approx)

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