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{ "quality": "blurry", "question_count": 1, "skills_matched": [ "step_cot", "multiple_choice_formatter", "explain_then_answer", "quick" ], "needs_drawing": false, "concepts_used": [ "Rhombus Properties" ], "new_concepts": [ "Area of a Rhombus" ], "current_concepts": [ "Rhombus Properties", "Area of a Rhombus" ] } ## State the area formula of a rhombus $$ A = \frac{1}{2} \cdot d_1 \cdot d_2 $$ ## Substitute the given values into the formula $$ 65 = \frac{1}{2} \cdot 13 \cdot d_2 $$ ## Solve for the unknown diagonal length $$ \begin{aligned} 130 &= 13 \cdot d_2 \ d_2 &= 10 \end{aligned} $$

(A) 5 units

(B) 6 units

(C) 10 units

(D) 12 units

{ "subject": "Mathematics", "question_type": "Multiple Choice", "knowledge_point": [ "Mathematics", "Geometry", "Area of a Rhombus" ] }

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Question

Explanation:

State the area formula of a rhombus

Substitute the given values into the formula

Solve for the unknown diagonal length

Answer: