Can any one tell me if this is right

Can someone me with my hwplz(only the circled ones)

Can someone check if i did this correct. it’s number 4 if you’re wondering.

Complete the steps, which describe how to find the area of the shaded portion of the circle. find the area of the sector by multiplying the area of the circle by the ratio of the to 360. subtract the area of the triangle from the area of the sector.