Respuesta :
Answer:
[tex]1920 in^2\\[/tex]
Step-by-step explanation
Number of triangle in octagon [tex]= 8\\[/tex]
Area of one triangle [tex]= \frac{1}{2} bh\\= (0.5)(20) (24)\\= 240 in^2\\[/tex]
Area of eight triangle = Area of Octagon
[tex]= 8 * 240 in^2\\= 1920 in^2\\[/tex]