Answer:
Your answer is C, 10.7cm
Explanation:
The two flat sides of the figure are 3 cm, so that part of the perimeter = 6cm
3cm is the radius of what would be a whole circle. We'll calculate the circumference, then divide by 4.
Circumference = (2)(pi)(r)
C = (2)(3.14)(3)
C = 18.84
18.84/4 = 4.71
Add 4.71 to the 6 cm above, = 10.71
Let me know if you have questions about this.