Help find the length of MK

Arestaurant offers a $12 dinner special that has 5 choices for an appetizer, 12 choices for an entrée, and 4 choices for a dessert. how many different meals are available when you select an appetizer, an entrée, and a dessert? a meal can be chosen in nothing ways. (type a whole number.)

Which basic geometric term has no width, no length, and no thickness? line b. point c. angle d. plane

The center of the circumscribed circle lies on line segment and the longest side of the triangle is equal to the of the circle.