He diagram shows a semi-circle inside a rectangle of lenght 150m the sem-circle touches the rectangle at A, B and C
Calculate the PERIMETER of the shaded region
Give your answer correct to 3 significant fogures

sorry, i can't understand your question. will later if you describe more clearly!

: )

20

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.

dont know

step-by-step explanation: