Assertion: triangle's area | /r/HasProperty | rational
Facets:
Source sentences:
text: By Pick's theorem a lattice triangle has a rational area that either is an integer or has a denominator of 2.
text: The term is sometimes applied more widely to triangles whose sides and area are all rational numbers, since one can rescale the sides by a common multiple to obtain a triangle that is Heronian in the above sense.
text: Since the area of an equilateral triangle with rational sides is an irrational number, no equilateral triangle is Heronian.