Question

geo help

Answer 1

@johnweldon1993

Answer 2

@mathmale

Answer 3

Have you tried drawing the possible triangles, all with sides 5 and 10, with differing third sides? I'd bet that such illustrations would tell y ou pretty quickly which of the four possible triangles is/are acute.

Answer 4

Another way to approach this would be to use the Pythagorean Theorem to determine whether any 3 sides produce a right triangle (which we'd eliminate because it is not acute).