Geometry Practice Test 2

If a, b and c denotes the sides of a triangle, then choose correct statement.
I. If ${\mathit{c}}^2$ < ${\mathit{a}}^2+{\mathit{b}}^2$, then the triangle is acute angled.
II. If ${\mathit{c}}^2$ = ${\mathit{a}}^2+{\mathit{b}}^2$, then the triangle is right angled.
III. If ${\mathit{c}}^2$ > ${\mathit{a}}^2+{\mathit{b}}^2$ , then the triangle is obtuse angled.