Answer: m∠1 = 32° Step-by-step explanation: Since we have given that The angled support making angle with the floor = 32° So, we need to find the measure of angle 1 so that the steps are parallel to the floor. As we know that "To make parallel to the floor , there should be alternate interior angle which must be equal." So, m∠1 = 32° ( the angled support making angle with the floor) Hence, m∠1 = 32°