Answer:
20.57 cm
Step-by-step explanation:
Circumference of half circle = diameter + half of circumference
[tex]= 8 +\dfrac{2\pi r}{2}\\\\\\= 8 + \pi r\\\\= 8 + 3.142 * 4\\\\= 8 + 12.568\\\\= 20.568\\\\= 20.57 \ cm[/tex]
