The number of iterations required to find the root at r = R depends on the initial guess Xo, this is because when using Newton's method for finding roots, you will need to pick an initial guess and this will be followed by an iterative process which would converge to a solution. The number of roots before the converging will take place depends on the initial guess Xo made
The Triangle Sum Theorem states that the sum of the angles of a triangle equal 180°. Therefore, 45° + 62° + k = 180 107° + k = 180 k = 73° The value of k is 73°
