We don't need the figure angle b = 44 degrees angle a = 62 degrees angle e = 50 degrees angle f = unknown we know that angle a + b + e + f = 180 degrees 50 + 44 + 62 + f =180 degrees f= 180-50-44-62 but here there is only one blank so we have to add 44 and 62 to make one number that is 106 therefore, f = 180-50-106 if you further want to solve it angle f is 24