BREAKING: Target Test Prep releases Brand New 2026 On Demand GMAT prep course

Redeem

Geometry

This topic has expert replies
Post new topic Post Reply
Previous Topic Next Topic
Source: — Problem Solving |
User avatar
Master | Next Rank: 500 Posts
Posts: 496
Joined: Tue Jun 07, 2011 5:34 am
Thanked: 38 times
Followed by:1 members

by sl750 » Tue Aug 16, 2011 5:05 am
This question uses the properties of right triangles that are in the ratio of 1:sqrt(3):2

Since AC = sqrt(100-25) = 5*sqrt(3). This tells us angle x = 30. Therefore Angle D is 60. Using the above ratio, if EC is 10, then DC = 10/sqrt(3)
Top
Post new topic Post Reply
• Page 1 of 1