Problem 6.1: How many central angles are there in a regular hexagon, and what is the measure of each? [Solution]

Problem 6.2: If the apothem of a regular triangle is 3, and the base is 4, what is the area of the triangle? [Solution]

Problem 6.3: A regular polygon has area 40 and apothem 8. What is its perimeter? [Solution]

Problem 6.4: A square has apothem 3. What is its area? [Solution]

Problem 6.5: What is the area of a regular polygon with apothem 6 and side length 12? [Solution]