Doğruda Açılar ve Açıortaylar

4.

$m(\widehat{BOD}) = 75^\circ$

$m(\widehat{AOF}) = ?$

A) 110 B) 120 C) 130 D) 140 E) 150

Soruda görsel içerik var: A diagram showing several rays originating from a central point O. There is a straight line passing through points A and F, with O in between. Ray OA points left, ray OF points right (diagonally down). Several other rays point upwards: OB, OC, OD, and OE. Ray OC is labeled with a tick mark on angles BOC and COD, implying OC is an angle bisector of angle BOD. Ray OD is labeled with arcs on angles COE and DOE, but the handwriting 'b' over angles COE and DOE and 'a' over angles AOB and BOC is more prominent. There's a label of 80 degrees for angle EOF. The image also contains handwritten notations 'a' for m(AOB) and m(BOC), and 'b' for m(COD) and m(DOE).