A 3cm x 10cm rectangle sits inside a circle with radius of 12cm. What is the area of the shaded region?

422.39cm

Area of shaded region = 422 cm²

Step-by-step explanation:

Area of rectangle = length * breadth

= 3cm * 10cm

= 30cm²

Area of circle = πr²

= 3.14 * 12²

= 3.14 * 12cm * 12cm

= 452.16 cm²

Area of shaded region = Area of circle - Area of rectangle

= (452.16 - 30) cm²

= 422 cm²