I need help on this why are yall deleteing my questions?

The measure of one angle of an octagon is two times smaller that of the other seven angles. what is the measure of each angle?

The cross-sectional areas of a right triangular prism and a right cylinder are congruent. the right triangular prism has a height of 6 units, and the right cylinder has a height of 6 units. which conclusion can be made from the given information? the volume of the triangular prism is half the volume of the cylinder. the volume of the triangular prism is twice the volume of the cylinder. the volume of the triangular prism is equal to the volume of the cylinder. the volume of the triangular prism is not equal to the volume of the cylinder.

If the value of cos330°is√3/2 then find cos 165°.