Assertion: icosahedron's angle | /r/HasProperty | 90 degrees
Facets:
Source sentences:
text: Since the interior angle of a square is 90 degrees, at most three squares can meet at a vertex.
text: Since the interior angle of a square is 90 degrees, at most three squares can meet at a vertex.
text: So, if the total angle was 90 degrees, I would have to cut each piece at 45 degrees; then when they are fastened together they form an angle of 90 degrees.