1. The problem asks if the triangle with angles 102°, 47°, and 31° is isosceles. 2. Recall that an isosceles triangle has at least two equal angles. 3. Check the given angles: 102°, 47°, and 31°. 4. Since none of these angles are equal, the triangle does not have two equal angles. 5. Therefore, the triangle is not isosceles. Final answer: No, the triangle is not isosceles.