Answer:
544 units²
Explanation:
What you can see, hopefully, is that there is a clue given in the picture;
The polygon is divided into 8 triangles which will all be the same since the polygon is regular, meaning all the sides are the same length;
This means all the triangles will be the same area;
Since, we know how to find the area of a triangle and that there are 8 of these, we can find the entire area of the polygon:
P = area of polygon
T = area of a triangle
b = base
h = perpendicular height
T = ¹/₂ × b × h
T = ¹/₂ × 8 × 17
T = 4 × 17
T = 68
P = 8 × T
P = 8 × 68
P = 544