Geometry 3d Shapes Hard — Set 98

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        "problems": [
            {
                "id": 1,
                "type": "geometry",
                "subType": "perimeter",
                "shape": "circle",
                "question": "What is the perimeter (circumference) of a circle with radius 28? (use π ≈ 3.14)",
                "answer": 175.93,
                "correctAnswer": "175.93",
                "difficulty": "hard"
            },
            {
                "id": 2,
                "type": "geometry",
                "subType": "count-sides",
                "shape": "circle",
                "question": "How many sides does a circle have?",
                "answer": 0,
                "correctAnswer": "0",
                "difficulty": "hard"
            },
            {
                "id": 3,
                "type": "geometry",
                "subType": "perimeter",
                "shape": "pentagon",
                "question": "What is the perimeter of a pentagon with each side = 26?",
                "answer": 130,
                "correctAnswer": "130",
                "difficulty": "hard"
            },
            {
                "id": 4,
                "type": "geometry",
                "subType": "count-sides",
                "shape": "octagon",
                "question": "How many sides does a octagon have?",
                "answer": 8,
                "correctAnswer": "8",
                "difficulty": "hard"
            },
            {
                "id": 5,
                "type": "geometry",
                "subType": "perimeter",
                "shape": "hexagon",
                "question": "What is the perimeter of a hexagon with each side = 27?",
                "answer": 162,
                "correctAnswer": "162",
                "difficulty": "hard"
            },
            {
                "id": 6,
                "type": "geometry",
                "subType": "count-sides",
                "shape": "square",
                "question": "How many sides does a square have?",
                "answer": 4,
                "correctAnswer": "4",
                "difficulty": "hard"
            },
            {
                "id": 7,
                "type": "geometry",
                "subType": "identify-shapes",
                "shape": "hexagon",
                "question": "What is the name of a shape with 4 sides?",
                "answer": "square",
                "correctAnswer": "square",
                "difficulty": "hard"
            },
            {
                "id": 8,
                "type": "geometry",
                "subType": "identify-shapes",
                "shape": "pentagon",
                "question": "What is the name of a shape with 5 sides?",
                "answer": "pentagon",
                "correctAnswer": "pentagon",
                "difficulty": "hard"
            },
            {
                "id": 12,
                "type": "geometry",
                "subType": "count-sides",
                "shape": "pentagon",
                "question": "How many sides does a pentagon have?",
                "answer": 5,
                "correctAnswer": "5",
                "difficulty": "hard"
            },
            {
                "id": 13,
                "type": "geometry",
                "subType": "identify-shapes",
                "shape": "octagon",
                "question": "What is the name of a shape with 3 sides?",
                "answer": "triangle",
                "correctAnswer": "triangle",
                "difficulty": "hard"
            },
            {
                "id": 14,
                "type": "geometry",
                "subType": "perimeter",
                "shape": "octagon",
                "question": "What is the perimeter of a octagon with each side = 8?",
                "answer": 64,
                "correctAnswer": "64",
                "difficulty": "hard"
            },
            {
                "id": 15,
                "type": "geometry",
                "subType": "perimeter",
                "shape": "hexagon",
                "question": "What is the perimeter of a hexagon with each side = 25?",
                "answer": 150,
                "correctAnswer": "150",
                "difficulty": "hard"
            },
            {
                "id": 18,
                "type": "geometry",
                "subType": "area",
                "shape": "octagon",
                "question": "What is the area of a rectangle with length 42 and width 30?",
                "answer": 1260,
                "correctAnswer": "1260",
                "difficulty": "hard"
            },
            {
                "id": 20,
                "type": "geometry",
                "subType": "count-sides",
                "shape": "rectangle",
                "question": "How many sides does a rectangle have?",
                "answer": 4,
                "correctAnswer": "4",
                "difficulty": "hard"
            }
        ],
        "layout": {
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    "_archetype": "form-exercise",
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