Answer:
325 sq units
Step-by-step explanation:
since, the apothem(a) is 10 units, and the polygon is a 10-gon,
If we divide the polygon into 10 equal triangles,
the base is of each triangle is 2 * 10 * tan(360/ (10* 2))
and height is equal to apothem = 10
so the area of polygon = 10 * (area of each triangle)
= 10 * (1/2 * 10 * 2 * 10 * tan(360/20) = 325 sq units
