Answer this question pls......
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Step-by-step explanation:
let the point on line where curved line crosses is C
AC + CB = 18 ---- A
perimeter of a semicircle = 2pi×r/2 =pi×r
AC is diameter of smaller semicircle
smaller semicircle perimeter = pi×AC/2
CB is diameter of bigger semicircle
bigger semicircle perimeter = pi × CB /2
length of curved line = perimeter of smaller + perimeter of bigger semicircle
= pi/2×AC + pi/2×BC
= pi/2(AC + BC)
substitute A
= pi/2×18 =9×pi = 9×22/7=198/7 = 28.29 cm
length of curved line = 28.29cm
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