angle a and b are two adjacent angles of a parallelogram, if angle a=55 degree the angle b is degree

Find the surface area of the prism formed by the net

For the following geometric sequence, find the recursive formula. {-80, 20, -5, } i need : ')

Consider the triangle. which shows the order of the angles from smallest to largest? angle a, angle b, angle c angle b, angle a, angle c angle b, angle c, angle a angle c, angle a, angle b