Help!! Prove Trigonometric identity

Two rigid transformations are used to map abc to qrs. the first is a translation of vertex b to vertex r. what is the second transformation? a reflection across the line containing ab a rotation about point b a reflection across the line containing cb a rotation about point c

Which expression converts 45 degree to radians

Solve the equation: x - 9 = -6 + 5 a. 21 b. 7 c. 14 d. 2