To be able to find the exterior angle of a 24-gon or a polygon with 24 sides, we will be using the formula below:
[tex]\text{ }\Theta_{Exterior}=\text{ }\frac{360}{n}[/tex]Where,
n = number of sides
We get,
[tex]\text{ }\Theta_{Exterior}=\text{ }\frac{360}{n}[/tex][tex]\text{ = }\frac{360}{24}[/tex][tex]\text{ }\Theta_{Exterior}=\text{ }15^{\circ}[/tex]Therefore, the measure of each exterior angle of a 24-gon is 15°.