Answer:
Area:

Perimeter: 20

Explanation:
If we take half of one of these "pedals" we can see that it is simply 1/4 of a circle with radius 5, subtracted by a triangle. Let's calculate this half-pedal.

That means 4 pedals is equal to:


So.. The area of the shaded region is

Perimeter is even simpler. the half-pedal is just 1/4 of the circumference of the circle. The circumference is just
, which means our half pedal is:

Multiplying by 8, our perimeter is just 20
.