Answer:
(a) three angles: 62°, 34°, and 84°
Explanation:
You want to know which specification can result in an infinite number of triangles.
Angles only
If only the angles are specified, the sides can have an infinite number of (related) lengths.
three angles: 62°, 34°, and 84° will create an infinite number of triangles
Sides only
Assuming the side lengths can form a triangle, they will specify exactly one triangle.
Lengths 3 cm, 5 cm, and 10 cm cannot form a triangle.
Sides and angle between
When two sides are specified along with the angle between them, exactly one triangle can be formed.