Final answer:
One triangle can be formed.
Step-by-step explanation:
To determine the number of triangles that can be created with the given angles, we need to consider the properties of triangles and angle sums.
In a triangle, the sum of the angles is always 180 degrees.
Given that two of the angles are 21° and 48°, we can find the measure of angle A by subtracting the sum of the other two angles from 180°. Angle A = 180° - (21° + 48°) = 111°.
Since the measure of angle A is 111°, we have one triangle that can be formed.
Therefore, the answer is 1.