Homework Help: Algebra

Posted by Milly on Monday, November 22, 2010 at 7:22pm.

There are two similar triangles XYZ, and ABC. If x = 12 and z = 3c, find a. How do I work with that problem when z = 3c?

Algebra - Brooke, Monday, November 22, 2010 at 8:14pm
Similar are proportional.
12 is to a as 3c is to c
cross product 12c = 3ac
divide both sides by 3c and a = 4

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