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In the figureabove, triangle ABC is isosce­les with base AC.  If x =60˚, ... ...


In the figure above, triangle ABC is isosce­les with base AC.  If x = 60˚, then AC =
(A) 2
(B) ...
(C) ...
(D) ...
(E) ...

*This question is included in Nova Press: Problem Solving Diagnostic Test

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Posted: 03/10/2012 08:34
Isoceles or equilateral? Can a right triangle be an isoceles? No!
Contributor
 
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Posted: 03/10/2012 18:56
Pepe, as stated in the problem, the triangle is isosceles. There is nothing in the problem that says anything about right triangle. It only says in the explanation that it turns out the triangle is also equilateral, not just isosceles.
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Posted: 10/16/2012 23:48
An isosceles triangle has at least two equal sides, but it can have three. When all sides are equal, it is also called an equilateral triangle.

In other words, all equilateral triangles are isosceles triangles, but not all isosceles triangles are equilateral.
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In the figureabove, triangle ABC is isosce­les with base AC.  If x =60˚, ... ... 
Posted: 11/17/2016 17:17
Good to know :)
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