Math Problem Statement
円に内接する四角形ABCDにおいて、AB=4、BC=4、AD=5、角A=60°のとき、四角形ABCDの面積は?
Solution
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Math Problem Analysis
Mathematical Concepts
Geometry
Trigonometry
Formulas
Cosine Law
Sine Law
Triangle Area Formula
Theorems
Properties of Inscribed Quadrilaterals
Suitable Grade Level
High School
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