Question

can the sides of a triangle have lengths of 2, 40, and 42? if so, what kind of triangle is it? yes, acute yes, right yes, obtuse no

Explanation:

Step1: Check triangle - inequality theorem

The sum of the lengths of any two sides of a triangle must be greater than the length of the third side.
$2 + 40=42$, but for a triangle $a + b>c$, $a + c>b$ and $b + c>a$. Here $2+40$ is not greater than $42$.

Answer:

D. no