{ "name": "Geometry of Circles", "order": 23, "challenges": [ { "id": "59a5801209a6acac5983b513", "title": "Semicircles and Quarter Circles", "description": [ "" ], "challengeSeed": [ "" ], "tests": [ "" ] }, { "id": "59a5801209a6acac5983a386", "title": "Identify Circle Components", "description": [ "" ], "challengeSeed": [ "" ], "tests": [ "" ] }, { "id": "59a5801209a6acac5983a387", "title": "Use Diameter, Radius and Pi", "description": [ "" ], "challengeSeed": [ "" ], "tests": [ "" ] }, { "id": "59a5801209a6acac5983a388", "title": "Circumference", "description": [ "" ], "challengeSeed": [ "" ], "tests": [ "" ] }, { "id": "59a5801209a6acac5983a389", "title": "Diameter or Radius of a Circle Given Circumference", "description": [ "" ], "challengeSeed": [ "" ], "tests": [ "" ] } ] }