Problem 3.1: What is the diameter of a circle with radius 7? [Solution]

Problem 3.2: What is the circumference of a circle with radius 7? [Solution]

Problem 3.3: What is the area of a circle with radius 7? [Solution]

Problem 3.4: What is the radius of a circle with diameter 8? [Solution]

Problem 3.5: What is the circumference of a circle with diameter 8? [Solution]

Problem 3.6: What is the area of a circle with diameter 8? [Solution]

Problem 3.7: What is the radius of a circle with area 23? [Solution]

Problem 3.8: What is the diameter of a circle with area 23? [Solution]

Problem 3.9: What is the circumference of a circle with area 23? [Solution]