The centre of each semicircle is on dc. work out the area of the shaded region. give your answer correct to 3 significant figures.

Area of the shaded region be 251.74 cm² .

Step-by-step explanation:

Formula

i.e

As shown in the figure.

AB = 28 cm , DC = 12cm and h = 14 cm

Putting in the above

Area of trapezoid = 280 cm²

Formula

Where r is the radius of the circle.

r = 3 cm

Area of two semicircle = 28.26 cm²

Area of the shaded area =  Area of trapezoid - Area of two semicircle

                                         =  280 cm² - 28.26 cm²

                                         = 251.74 cm²

Therefore the area of the shaded region be 251.74 cm² .

answer: all the values are within because it has a pattern that repeats from -6 to 4.

good luck!

it is b)

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step-by-step explanation: