LESSON 3: Word Problems involving Circumference O OPTIMIZE Answer the following questions in your notebook User3.14 What is the circumference of a circle with a radius of 12 om? If a circle has a diameter of 18 cm, then what is its circumference? 3 Two circles have radil of 3 cm and 6 cm, respectively. What is the difference in their circumferences? Circle A has a greater circumference than Circle 8 What is the relationship between their respective radi? What is the length of the diameter of a circle with a circumference of 12x? 4​