Question

please find the answer of no 2 HOTS

Answer 1

Answer:

37.71

Step-by-step explanation:

ad=diameter of a circle of radius 6cm=12

therefore,ab=bc=cd=12/3= 4cm, bd=bc+cd=(4+4)cm=8cm.

let a be the perimeter and A be the area of the shaded region.

a=arc of semi circle of radius 6cm+arc of semi circle of radius 4cm+arc of semi circle of radius 2cm.

a=\pi *6+\pi *4+\pi *2=12\pi cm.

A=area of semi circle with ad as diameter+area of semi circle with ab-area of semi circle with bd as diameter.

A=1/2*22/7*(6)square +1/2*22/7*(2)square-1/2*22/7*(4)square.

A= 1/2*22/7(6square+2square-4square)=1/2*22/7*24= 264/7=  

37.71 (cm)square.

• /-refers to divided by.
• *-means multiplys.
• A-refers to area.