Answer:
about 317
Step-by-step explanation:
You can break up the pentagon into 5 isoceles triangles
with length of 20√3/3 for the legs. Using the law of Sines are formula, we can see the area of one triangle is the leg * leg * sin(joining angle) /2.
The angle measure between it is 360/5 = 72 degrees.
So we plug it in and we get 317.01 ish.
I hope that helped and i need a brainly mark please :)
