A5cm x 11cm rectangle sits inside a circle with a radius of 12cm
what is the area of the shaded region? the shaded region is the circle - the rectangle inside it.

397.57

Step-by-step explanation:

Area of the rectangle                          = 5 x 11

                                                             = 55cm²

Area of the circle                                 = πr²

                                                             =   22/7 x 12 x 12

                                                             = 22 x 144/7

                                                             = 452.57cm²

Therefore , area of the shaded region

               = 452.57 - 55

               = 397.57cm²    

c

step-by-step explanation:

second option

step-by-step explanation:

the measures of a triangle equal 180. use that to find x.

2x+3x+4x=180

9x=180

9x/9=180/9

x=20

now you know x, you know angle a is 40°, angle b is 60°, angle c is 80°.

because angle a is 40°, the first option doesn't work.

because angle b is 60°, the second option does work.

when you add angle a and b, you get 100°. complementary means it equals 90°, so the third option doesn't work.

when you add angle a and c, you get 120°, which is not 100.