A curve is constructed of three semicircles, the first with a diameter of 2 cm, the second with a diameter of 3 cm, and the third with a diameter of 4 cm. Which of the following is closest to the length of the curve?

the smaller semi circle can fill in the empty space on the 10cm radius. this makes it easier to work out the answer as you only have to work out one big semicircle. so first to work out the area of the circle is = 3.142 x radius^2

TO Work out the semi circle +

to work out the semi circle= 3.142 x radius^2 and then divide the answer by 2. so 3.142 x 10^2 which is 3.142 x 100 = 314.2 314.2 divide by 2 = 157.1 THE ANSWER IS 157.1

both equations and proportions are better.

30 units^2

step-by-step explanation:

area is l × w

the length is 3

and the width is 10

3 × 10= 30 units squared