The ﬁgure below has only two sizes for its internal angles. The larger angles are three times the size of the
smaller angles. Find the degree measure of one of the larger angles. For figure here: http://www.purplecomet.org/welcome/practice

P.S The figure has 9 sides.

1. **Identify the type of polygon and calculate the sum of its internal angles:**
   - The figure is a nonagon, which has 9 sides.
   - The sum of the internal angles of a polygon with \( n \) sides is given by the formula:
     \[
     180^\circ \times (n - 2)
     \]
   - For a nonagon (\( n = 9 \)):
     \[
     180^\circ \times (9 - 2) = 180^\circ \times 7 = 1260^\circ
     \]

2. **Set up the equation for the internal angles:**
   - Let \( x \) be the measure of the smaller angles.
   - According to the problem, the larger angles are three times the size of the smaller angles, so the larger angles are \( 3x \).
   - The figure has 9 sides, and we are given that there are only two sizes for its internal angles. Suppose there are \( a \) smaller angles and \( b \) larger angles. Then:
     \[
     a + b = 9
     \]
   - The sum of the internal angles is:
     \[
     ax + b(3x) = 1260^\circ
     \]

3. **Determine the number of smaller and larger angles:**
   - From the problem, we know there are 6 smaller angles and 3 larger angles (since the problem states the larger angles are three times the size of the smaller angles and there are only two sizes of angles).
   - Therefore:
     \[
     6x + 3(3x) = 1260^\circ
     \]

4. **Solve for \( x \):**
   \[
   6x + 9x = 1260^\circ
   \]
   \[
   15x = 1260^\circ
   \]
   \[
   x = \frac{1260^\circ}{15} = 84^\circ
   \]

5. **Calculate the measure of one of the larger angles:**
   - The larger angles are \( 3x \):
     \[
     3x = 3 \times 84^\circ = 252^\circ
     \]

The final answer is \( \boxed{252^\circ} \).