Assertion: equilateral triangle | /r/HasAspect | exactly two equal sides
Facets:
Source sentences:
text: Some mathematicians define an isosceles triangle to have exactly two equal sides, whereas others define an isosceles triangle as one with at least two equal sides.  
text: Some mathematicians define an isosceles triangle to have exactly two equal sides, whereas others define an isosceles triangle as one with two equal sides.
text: In an isosceles triangle that has exactly two equal sides, the equal sides are called legs and the third side is called the base.