We have information on the hypotenuse, now we must calculate the sides.
Using the x-coordinates of the points of the hypotenuse we obtain
1 - (-8) = 9
Using the y-coordinates of the points of the hypotenuse we obtain
3 - (-9) = 12
Now lets graph
Distance
![\begin{gathered} d=\sqrt[]{9^2+12^2} \\ d=15 \end{gathered}](https://img.qammunity.org/2023/formulas/mathematics/college/ck054s7ufbanpmgepktfeyc33lhuux1p33.png)
The distance would be 15