The diagram shows a semi-circle inside a rectangle of length 150 m.
The semi-circle touches the rectangle at A, B and C.
Calculate the PERIMETER of the shaded region. Give your answer correct to 3 significant figures. Ive worked out everything so far but im missing a mark

The diagram shows a semicircle inside a rectangle of length 150 m The semicircle touches the rectangle at A B and C Calculate the PERIMETER of the shaded region class=