The sides of a triangle measure 3 cm, 5 cm, and 7 cm. One of the angles is 120°. Which type of triangle is it?

For this case, we have that by definition, a scalene triangle is one that has all its unequal sides. Also the angles, have different measures.

In addition, a triangle can be classified according to its angles.

An obtusangle triangle is one that has an obtuse angle, that is, greater than 90 degrees.

So, we have an obtusangle scalene triangle.

Answer:

obtusangle and scalene