Question

A scalene triangle is a right triangle.
Always
sometimes
never

Answer 1

Sometimes

Answer 2

Sometimes.

When its not, it can have an acute and one obtuse
When it is, that's why we have the Pythagorean Theorem

Answer 3

Do you know what a scalene triangle is?
It is a triangle whose three sides are all different lengths.
It may or may not be a right triangle.