An angle measures 150° more than the measure of its supplementary angle. What is the measure of each angle?

Determine whether the following statements are true and give an explanation or counterexample. bold a. when using the shell method, the axis of the cylindrical shells is parallel to the axis of revolution. bold b. if a region is revolved about the y-axis, then the shell method must be used. bold c. if a region is revolved about the x-axis, then in principle it is possible to use the disk/washer method and integrate with respect to x or the shell method and integrate with respect to y.

An arc subtends a central angle measuring 7pi/4 radians what fraction of the circumference is this arc?

Can someone me with these two circle theorem questions asap?