10 1 point
O A is shown below. AD is 15in and mZDAE = 155º.
Find the area of the shaded region. Round your answer to the nearest tenth. Do not include units in your
answer.
4

“exterior angles of triangles. an exterior (or external) angle is the angle between one side of a triangle and the extension of an adjacent side. try this drag the orange dots on any vertex to reshape the triangle.” look to get to the answer i explained what it means and other things i hope it you .

So confused right here i need it to be more clearer