what is m CBT? Use a protractor to help you.
m∠CBT is not 120°.You have to notice the start of the measure of the angle is on the point of C. It is the 0°.If the segment BT is straight up from the point of B, its angle will be 90°. Since the segment does not form a right angle, its measure of angle is less than 90° but more than 0°