March 4th, 2014, 01:55 AM  #1 
Newbie Joined: Mar 2014 Posts: 1 Thanks: 0  Angles question [GEOMETRY]
Just checking, in order to see if two triangles are similar 2 of each triangles corresponding angles needs to be the same. In this case E and A are the same: 90 degrees as well as B and D since B and D share a single line and the 90 degree line. Is this correct? https://s.yimg.com/hd/answers/i/0ae6977 ... c39f1597bc 
March 4th, 2014, 09:06 AM  #2 
Global Moderator Joined: Dec 2006 Posts: 20,757 Thanks: 2138 
If two angles of a triangle are known, the third angle can be calculated. If the three angles of a triangle ABC have the same values as the three angles of a triangle DEF, the triangles are similar. In general, there are sometimes more convenient ways of showing that two triangles are similar. I couldn't see the image for some reason, but your information suggests you are right.


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