Four identical semi-circles are drawn inside the semi-circle with diameter AB in the figure, such that AB = 8cm. What is the perimeter of the figure bounded by five semi-circles? (pi=3) A. 30 B. 24 C. 15 D. 12
1 Answer
Jun 19, 2018
Explanation:
"the circumference of a circle (C) is"
•color(white)(x)C=pidrArr1/2C=1/2pid
"Perimeter "="P of semi-circle"+"P of 4 identical"
"using "pi=3
d" of semi-circle "=8
"d of 4 identical semi-circles "=8/4=2
"perimeter "=1/2xx3xx8+4xx1/2xx3xx2
color(white)("perimeter ")=12+12=24" cm"