Answer:
12.4cm
Step-by-step explanation:
Circumference of a circle: [tex]\pi d[/tex] where d is the diameter.
Therefore circumference of a quarter circle (just the arc): [tex]\frac{1}{4} \pi d[/tex]
Arc AB = [tex]\frac{1}{4} *\pi * (2*7.9)[/tex] since Diameter = 2 times of Radius
Arc AB = [tex]\frac{1}{4}*3.14*15.8[/tex] = 12.4cm (rounded to the nearest tenth)
