Atriangle has angle measurements of 30°, 105°, and 45°. what kind of triangle is it?

equilateral

isosceles but not equilateral

scalene

The answer to your question is: Scalene

Step-by-step explanation:

Equilateral  it is not equilateral because in an equilateral triangle, the angles measure 60°

Isosceles but not equilateral , it is not an isosceles triangle because in an isosceles triangles two angles measure the same.

Scalene it is a scalene triangle, because in a scalene triangle the three angles have different measures.

it is a. 4.2 because 7.6-3.4 gets the remaining length of 4.2. i might be wrong but i am pretty sure this is the answer.