In the wire shown in $($Figure $1)$ segment BCBC is an arc of a circle with radius $30\mathrm{.}0$ cmcm$,$ and point PP is at the center of curvature of the arc. Segment DADA is an arc of a circle with radius $20\mathrm{.}0$ cmcm$,$ and point PP is at its center of curvature. Segments CDCD and ABAB are straight lines of length $10\mathrm{.}0$ cmcm each.